TW201818737A - Wireless communication between wideband eNB and narrowband UE - Google Patents

Abstract

A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus may perform a dual CCA procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful. The apparatus may transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful and may refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful. In performing the dual CCA procedure, the apparatus may perform CCA for a first period of time then perform eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

Description

Wireless communication between wideband eNB and narrowband UE

This patent application claims U.S. Provisional Application No. 62 / 416,651 entitled `` WIRELESS COMMUNICATION BETWEEN WIDEBAND ENB AND NARROWBAND UE '' filed on November 2, 2016, and the name of the application filed on June 27, 2017 The priority of US Patent Application No. 15 / 635,000 for "WIRELESS COMMUNICATION BETWEEN WIDEBAND ENB AND NARROWBAND UE" is expressly incorporated herein by reference in its entirety.

The content of this case is generally related to a communication system, and more specifically to wireless communication between a base station with different bandwidths and a user equipment (UE) (eg, between a wideband base station and a narrowband UE).

Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. A typical wireless communication system may adopt a multiplexing access technology capable of supporting communication with multiple users by sharing available system resources. Examples of such multiplexed access technologies include code division multiplexed access (CDMA) systems, time division multiplexed access (TDMA) systems, frequency division multiplexed access (FDMA) systems, orthogonal frequency division multiplexed memory Access (OFDMA) system, single carrier frequency division multiple access (SC-FDMA) system and time division synchronous division code multiple access (TD-SCDMA) system.

These multiplexing access technologies have been adopted in a variety of telecommunication standards to provide a common agreement that enables different wireless devices to communicate at the local, national, regional, and even global levels. One example telecommunication standard is Long Term Evolution (LTE). LTE is an enhanced set of Universal Mobile Telecommunications System (UMTS) mobile service standards published by the 3rd Generation Partnership Project (3GPP). LTE is designed to support mobile broadband access by using OFDMA on the downlink, SC-FDMA on the uplink, and multiple-input multiple-output (MIMO) antenna technology to improve spectrum efficiency, reduce costs, and improve services. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in LTE technology. These improvements can also be applied to other multiplexed access technologies and telecommunication standards that use them.

For example, a wireless multiplexing communication system may include multiple base stations, each of which simultaneously supports communication for multiple communication devices (otherwise known as user equipment (UE)). The base station can communicate with the UE on the downlink channel (for example, for transmission from the base station to the UE) and the uplink channel (for example, for transmission from the UE to the base station).

Some communication modes can enable the base station to communicate with the UE on the contention-based shared radio frequency band or different radio frequency bands of the cellular network (for example, licensed radio frequency band or unlicensed radio frequency band). As the amount of data transmission in a cellular network using licensed radio frequency bands continues to grow, offloading at least some of the data transmission to an unlicensed radio frequency band can provide the cellular service provider with an opportunity for enhanced data transmission capacity. Unlicensed radio frequency bands can also provide services in areas where access to licensed radio frequency bands is not available.

In narrow-band (NB) wireless communications, such as narrow-band Internet of Things (NB-IoT) or enhanced machine type communications (eMTC), wireless communications may involve limited bandwidth. For example, in NB-IoT, wireless communication can be limited to a single resource block (RB). In eMTC, communication can be limited to six RBs. This limited resource creates a unique challenge when sending information.

To provide a basic understanding of one or more aspects, a brief summary of these aspects is provided below. This general section is not an exhaustive overview of all expected aspects, nor is it intended to identify key or important elements of all aspects, or to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

The aspects presented in this article provide the ability to use unlicensed or shared radio frequency bands, provide opportunities for enhanced data transmission capacity, and also address unique challenges when sending narrowband wireless communications. Some aspects provide communication between base stations and UEs with different bandwidths in the unlicensed spectrum (eg, between a wideband base station and a narrowband UE). The communication may include Internet of Things (IoT) communication, such as NB-IoT, eMTC, and the like. By enabling wideband base stations to use narrowband UEs using unlicensed spectrum, a larger number of UEs can be served by fewer base stations.

In one aspect of the content of this case, a method, computer-readable media, and device for wireless communication at a base station are provided. The device executes a dual CCA procedure for a frame, wherein the dual CCA procedure includes a first type of CCA procedure. When the first type of CCA procedure is unsuccessful, the first type of CCA procedure is followed by a second type of CCA procedure. CCA procedures. When at least one CCA procedure in the dual CCA procedure is successful, the device can transmit during the frame, and when both CCA procedures in the dual CCA procedure are unsuccessful, the device can suppress the frame Send during. When executing the dual CCA procedure, the device may execute CCA in a first period of time, and then, when the CCA is unsuccessful, the device may execute eCCA in a second period of time following the CCA.

In another aspect of the content of the present case, a method, computer-readable medium, and device for wireless communication at a user equipment are provided. The device divides the uplink duration of each frame into multiple transmission units for each frequency, where the frame includes an integer number of transmission units. The device then sends an uplink communication based on the plurality of transmission units, where each transmission unit includes at least one on period and at least one off period corresponding to each of the plurality of frequencies, wherein during the on period , The UE sends uplink communications on the corresponding frequency, and during the off period, the UE suppresses sending uplink communications on the corresponding frequency.

In another aspect of the content of the present case, a method, computer-readable medium, and device for wireless communication at a user equipment are provided. The device transmits uplink transmission in a plurality of transmission units, and based on the base station hopping mode, skips the frequency band in the first mode across the frame. The uplink transmissions can be sent based on the double-hop mode, and the device can also hop in the second mode across the transmission unit within the channel occupation of the base station in the frame.

In another aspect of the content of the present case, a method, computer-readable medium, and device for wireless communication at a base station are provided. The device is based on a base station hopping mode, skips a frequency band in a first mode across a frame, and based on the base station hopping mode, receives uplink transmission in a narrow frequency from a user equipment in a plurality of transmission units within the frequency band. The uplink transmission may be received from the user equipment based on the double-hop mode, and the device may hop in the second mode across the transmission unit within the channel occupation of the base station in the frame. The uplink may be received from the user equipment in the same narrowband within the corresponding channel occupation of the base station in each frame. The base station may include a broadband base station, and the device may also multiplex and communicate with a plurality of narrow-band UEs.

In another aspect of the content of the present case, a method, computer-readable medium, and device for wireless communication at a base station are provided. The device performs a listen-before-talk (LBT) procedure at the beginning of each of the plurality of frames. The device sends a plurality of repetitions of transmission, wherein when the plurality of repetitions span multiple frames and the LBT procedure is unsuccessful for the first frame, the base station discards at least one repetition in the first frame or postpones the The at least one of the first frame is repeated until the second frame when the LBT procedure is successful.

In another aspect of the content of the present case, a method, computer-readable medium, and device for wireless communication at a user equipment are provided. The device receives a plurality of repetitions of a downlink transmission from a base station. When the plurality of repetitions span multiple frames, the device determines whether the base station sends at least one repetition of the downlink transmission in the first frame. The decision may include: determining whether the base station discards the at least one repetition in the first frame or delays the at least one repetition in the first frame until the second frame. The device may combine the plurality of repetitions across the plurality of frames.

To achieve the foregoing and related objectives, one or more aspects include features fully described below and features specifically indicated in the scope of the patent application. The following description and the drawings set forth in detail certain illustrative features of one or more aspects. However, these features are merely indicative features of some of the various ways in which the principles of aspects can be used, and this description is intended to include all such aspects and their equivalents.

The specific embodiments described below with reference to the drawings are intended as a description of various configurations, and are not intended to limit the scope of the content of this case. Indeed, to provide a thorough understanding of the inventive subject matter, specific implementations include specific details. It will be apparent to those of ordinary skill in the art to which this invention belongs that these specific details are not required in each case, and in some examples, well-known structures and components are shown in block diagram form for clarity of presentation.

Techniques are described in which an unlicensed radio frequency band is used for at least a portion of contention-based communication on a wireless communication system. In some examples, the contention-based shared radio frequency band may be used for LTE communication or advanced LTE (LTE-A) communication. Contention-based radio frequency bands may be used in conjunction with or independent of non-contention licensed radio frequency bands. In some examples, the contention-based radio frequency band may be a radio frequency band for which a device may also need contention access because the radio frequency band is at least partially available for license-free use, such as Wi-Fi use.

As the amount of data transferred in a cellular network using licensed radio frequency bands continues to grow, offloading at least some of the data into contention-based shared radio frequency bands, such as in unlicensed bands, can be reported to cellular service providers (for example, Service providers of public land mobile networks (PLMN) or coordinated base station sets that define cellular networks such as LTE / LTE-A networks) provide opportunities for enhanced data transmission capacity. As mentioned before, before transmitting on a contention-based shared radio frequency band, such as an unlicensed band, the device may execute an LBT procedure to gain access to the shared radio frequency band. Such LBT procedures may include execution of CCA procedures (or eCCA procedures) to determine whether a particular channel of the unlicensed radio frequency band is available. When it is determined that a channel based on the contention-based radio frequency band is available, a channel reservation signal (for example, CUBS) may be sent to reserve the channel. When it is determined that the channel is unavailable, the CCA procedure (or eCCA procedure) can be executed again for the channel at a later time.

When the base station and / or the UE includes multiple antenna ports capable of transmitting on a contention-based shared radio frequency band, transmissions from different antenna ports may interfere with each other due to the correlation between the transmitted signals. For channel reserved signals used to reserve channels based on contention-based shared radio frequency bands, reducing interference caused by the correlation between the transmitted signals provides a good detection capability for reserved channels and prevents Error detection can be important, where error detection will unnecessarily reserve channels and prevent other devices from using the channels. In order to reduce this interference caused by cross-correlation of signals from different antennas or auto-correlation of signals from a single antenna, the base station or UE may be based at least in part on the antenna port associated with the sequence of signals transmitted by the channel reservation. Antenna port identifier to generate the sequence. In this way, the association of channel reserved signals can be reduced, thereby improving the detection capability of signal transmission, resulting in more efficient and accurate reservation of channels based on contention-based shared radio frequency bands.

In other words, for the channel reservation signal used to reserve the channel of the unlicensed radio frequency band, the channel reservation signal should be configured with good detection capabilities to reduce false alarms, so as to try to access other shared radio frequency bands. The device can easily detect the channel reservation. Therefore, the channel reserved signal sequence should have good auto-correlation properties and good cross-correlation properties with sequences from neighboring base stations. For example, the primary synchronization signal (PSS), secondary synchronization signal (SSS), and / or channel status information reference signal (CSI-RS) may not have good autocorrelation between different base stations in a contention-based shared radio frequency band Attributes or good cross-correlation attributes. Therefore, the channel reservation signal sequence should be configured based at least in part on the antenna port identifier to provide good auto-correlation and cross-correlation properties.

The following description provides examples and does not limit the scope, applicability, or examples set forth in the scope of the patent application. Changes can be made in the function and arrangement of the elements discussed without departing from the scope of the content of this case. Each instance may omit, substitute, or add various programs or components as appropriate. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described in relation to some examples may be combined into other examples.

FIG. 1 is a diagram of an example wireless communication system 100 according to various aspects of the present disclosure. The wireless communication system 100 may include a base station 105, a UE 115, and a core network 130. The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The base station 105 may interface with the core network 130 via a backhaul link 132 (eg, S1, etc.) and may perform radio configuration and scheduling for communication with the UE 115, or may be in the base station controller (not shown) ). In various examples, the base station 105 may communicate with other base stations 105 directly or indirectly (eg, via the core network 130) via a backhaul link 134 (eg, X2, etc.), and the backhaul link 134 may be Wired or wireless communication link.

The base station 105 may communicate wirelessly with the UE 115 via one or more base station antennas. Each of the base station 105 websites may provide communication coverage for a corresponding geographic coverage area 110. In some examples, base station 105 may be referred to as a base station transceiver, a radio base station, an access point, a radio transceiver, a Node B, an eNB, a home node B, a home eNB, or some other suitable terminology. The geographic coverage area 110 for the base station 105 may be divided into sectors (not shown), and the sectors constitute only a part of the coverage area. The wireless communication system 100 may include different types of base stations 105 (eg, a macro cell base station or a small cell base station). There may be overlapping geographic coverage areas 110 for different technologies.

In some examples, the wireless communication system 100 may include an LTE / LTE-A network. In the LTE / LTE-A network, the term eNB may be used to describe the base station 105, and the term UE may be used to describe the UE 115. The wireless communication system 100 may be a heterogeneous LTE / LTE-A network, where different types of eNBs provide coverage for each geographical area. For example, each eNB or base station 105 may provide communication coverage for macro cells, small cells, or other types of cells. The term "cell" is a 3GPP term that can be used to describe a base station, a carrier or component carrier associated with a base station, or a coverage area (eg, sector, etc.) of a carrier or base station, depending on the context.

Macrocells can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unlimited access by a UE with a subscription to a service of a network provider. Compared to macro cells, small cells are low-power base stations that can operate in the same or different (eg, licensed, exempt, etc.) radio frequency bands as macro cells. Small cells may include pico cells, femto cells, and micro cells according to various examples. Pico cells can cover a relatively small geographic area and can allow unlimited access by UEs that have a subscription with the service of a network provider. Femtocells can also cover relatively small geographic areas (e.g., homes) and can be provided by UEs that have an association with the femtocells (e.g., UEs in a closed user group (CSG), for residential use) User's UE, etc.). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. The eNB may support one or more (eg, two, three, four, etc.) cells (eg, component carriers).

The wireless communication system 100 may support synchronous operation or asynchronous operation. For synchronous operation, base stations can have similar frame timing, and transmissions from different base stations can be approximately aligned in time. For asynchronous operation, the base stations may have different frame timings, and transmissions from different base stations may not be aligned in time. The techniques described herein can be used for synchronous or asynchronous operations.

A communication network that can accommodate some of the various disclosed examples may be a packet-based network operating in accordance with a layered protocol stack. In the user plane, communication at the bearer or packet data convergence protocol (PDCP) layer can be IP-based. The radio link control (RLC) layer can perform packet segmentation and reassembly to communicate via logical channels. The media access control (MAC) layer can perform priority processing and multiplex logical channels into transmission channels. The MAC layer can also use Hybrid ARQ (HARQ) to provide retransmission at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of the RRC connection between the UE 115 and the base station 105 or the core network 130 to support radio bearers for user plane data. At the physical (PHY) layer, a transmission channel may be mapped to a physical channel.

UEs 115 may be dispersed throughout the wireless communication system 100, and each UE 115 may be fixed or mobile. The UE 115 may also include or be referred to by those with ordinary knowledge in the field to which the present invention pertains as mobile stations, user stations, mobile units, user units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices , Mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile service client, client or some other suitable term. The UE 115 may be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a wireless phone, a wireless area loop (WLL) station, and the like. The UE can communicate with various types of base stations and network equipment (including macro eNBs, small cell eNBs, relay base stations, etc.).

The communication link 125 shown in the wireless communication system 100 may include a DL transmission from the base station 105 to the UE 115, or a UL transmission from the UE 115 to the base station 105. Downlink transmission can also be referred to as forward link transmission, and uplink transmission can also be referred to as reverse link transmission. In some examples, the UL transmission may include transmission of uplink control information, where the uplink may be sent on an uplink control channel (eg, a physical uplink control channel (PUCCH) or an enhanced PUCCH (ePUCCH)). Control information. The uplink control information may include, for example, acknowledgements and / or negative acknowledgements for downlink transmissions, or channel status information. The uplink transmission may also include the transmission of data, where data may be sent on the physical uplink shared channel (PUSCH) or enhanced PUSCH (ePUSCH). Uplink transmissions may also include sounding reference signals (SRS) or enhanced SRS (eSRS), physical random access channel (PRACH), or enhanced PRACH (ePRACH) (for example, the dual connectivity mode described with reference to Figures 2A and 2B Or in independent mode), or SR or enhanced SR (eSR) (eg, in the independent mode described with reference to FIGS. 2A and 2B). References to PUCCH, PUSCH, PRACH, SRS or SR in the content of this case are assumed to inherently include references to the corresponding ePUCCH, ePUSCH, ePRACH, eSRS or eSR.

In some examples, each communication link 125 may include one or more carriers, where each carrier may be a signal composed of multiple sub-carriers (eg, waveform signals of different frequencies) modulated according to the various radio technologies described above. Each modulated signal can be sent on a different subcarrier, and can carry control information (for example, reference signals, control channels, etc.), management burden information, user data, and so on. The communication link 125 may use frequency domain duplex (FDD) operation (for example, using paired spectrum resources) or time domain duplex (TDD) operation (for example, use unpaired spectrum resources) to send two-way communications. A frame structure for FDD operation (for example, frame structure type 1) and a frame structure for TDD operation (for example, frame structure type 2) can be defined.

In some aspects of the wireless communication system 100, the base station 105 or the UE 115 may include multiple antennas for adopting an antenna diversity scheme to improve the communication quality and reliability between the base station 105 and the UE 115. Additionally or alternatively, the base station 105 or the UE 115 may employ multiple-input multiple-output (MIMO) technology, which may utilize a multi-path environment to send multiple spatial layers carrying the same or different coded materials.

The wireless communication system 100 may support operations on multiple cells or carriers (a feature that may be referred to as carrier aggregation (CA) or multi-carrier operation). Carriers can also be referred to as component carriers (CC), layers, channels, and so on. The terms "carrier", "component carrier", "cell" and "channel" are used interchangeably herein. The UE 115 may be configured with multiple downlink CCs and one or more uplink CCs for carrier aggregation. Carrier aggregation can be used with both FDD and TDD component carriers.

The wireless communication system 100 may also or alternatively support non-contention-licensed radio frequency bands (e.g., radio frequency bands that a transmitting device may not contend for access to, because radio frequency bands are licensed to specific users for specific uses, such as Licensed radio frequency bands that can be used for LTE / LTE-A communications) or contention-based shared radio frequency bands (for example, transmitters may need to contend for access to unlicensed radio frequency bands because radio frequency bands can be used for unlicensed Use, such as Wi-Fi use). When winning contention for contention-based access to a shared radio frequency band, a transmitting device (for example, base station 105 or UE 115) may send one or more channel reservation signals (for example, One or more CUBS). The channel reservation signal may be used to reserve an unlicensed shared radio frequency spectrum by providing detectable energy in the unlicensed radio frequency band. The channel reservation signal may also be used to identify the transmitting device and / or the transmitting antenna, or may be used to synchronize the transmitting device and the receiving device. In some examples, channel reservation signal transmission may begin at a symbol period boundary (eg, an OFDM symbol period boundary). In other examples, CUBS transmissions may begin between symbol boundaries.

The number and arrangement of the components shown in FIG. 1 are provided as examples. In practice, the wireless communication system 100 may include additional devices, fewer devices, different devices, or devices arranged differently than those shown in FIG. 1. Additionally or alternatively, a group of devices (eg, one or more devices) of the wireless communication system 100 may perform one or more functions described as being performed by another group of devices of the wireless communication system 100.

Turning next to FIG. 2A, FIG. 200 illustrates a supplementary downlink mode (eg, a Licensed Assisted Access (LAA) mode) and a carrier for an LTE network supporting expansion to a contention-based shared spectrum LTE / LTE-A Example of aggregation mode. The diagram 200 may be an example of a portion of the system 100 of FIG. 1. In addition, the base station 105-a may be an example of the base station 105 of FIG. 1, and the UE 115-a may be an example of the UE 115 of FIG.

In the example of the supplementary downlink mode (eg, LAA mode) of FIG. 200, the base station 105-a may use the downlink 205 to send an OFDMA communication signal to the UE 115-a. Downlink 205 is associated with frequency F1 in the unlicensed spectrum. The base station 105-a may use the bidirectional link 210 to send OFDMA communication signals to the same UE 115-a, and may use the bidirectional link 210 to receive SC-FDMA communication signals from the UE 115-a. The bidirectional link 210 is associated with a frequency F4 in the licensed spectrum. The downlink 205 in the unlicensed spectrum may operate simultaneously with the bidirectional link 210 in the licensed spectrum. The downlink 205 may provide a downlink capacity offload for the base station 105-a. In some embodiments, the downlink 205 may be used for unicast services (eg, addressed to one UE) or for multicast services (eg, addressed to several UEs). This scenario can occur with any service provider (such as a traditional mobile network service provider or MNO) that uses licensed spectrum and needs to mitigate some traffic congestion and / or signal congestion.

In an example of the carrier aggregation mode in FIG. 200, the base station 105-a may send an OFDMA communication signal to the UE 115-a using the bidirectional link 215, and may receive the SC from the same UE 115-a using the bidirectional link 215 -FDMA communication signal. The bidirectional link 215 is associated with the frequency F1 in the unlicensed spectrum. The base station 105-a may also use the bidirectional link 220 to send OFDMA communication signals to the same UE 115-a, and may use the bidirectional link 220 to receive SC-FDMA communication signals from the same UE 115-a. The two-way link 220 is associated with a frequency F2 in the licensed spectrum. The bidirectional link 215 can provide downlink and uplink capacity offloading to the base station 105-a. As with the supplementary downlink (eg, LAA mode) described above, this scenario can occur with any service provider (eg, MNO) that uses licensed spectrum and needs to mitigate some traffic congestion and / or signal congestion.

In another example of the carrier aggregation mode in FIG. 200, the base station 105-a may send an OFDMA communication signal to the UE 115-a using the bidirectional link 225, and may receive the same signal from the same UE 115-a using the bidirectional link 225 SC-FDMA communication signal. The bidirectional link 225 is associated with a frequency F3 in the unlicensed spectrum. The base station 105-a may also use the bidirectional link 230 to send OFDMA communication signals to the same UE 115-a, and may use the bidirectional link 230 to receive SC-FDMA communication signals from the same UE 115-a. The bidirectional link 230 is associated with a frequency F2 in the licensed spectrum. The two-way link 225 can provide downlink and uplink capacity offload for the base station 105-a. This example and those provided above are provided for illustrative purposes, and there may be other similar operating modes or deployments for capacity offload in conjunction with LTE / LTE-A with or without contention-based shared spectrum Scenes.

As mentioned above, a typical service provider that can benefit from the capacity offload provided by using LTE / LTE-A extended to a contention-based spectrum is a traditional MNO utilizing LTE spectrum. For these service providers, operational configurations may include a bootstrapped mode (eg, supplementary downlink (eg, LAA mode), carrier aggregation) that uses LTE PCC on non-contention spectrum, And use LTE SCC on the contention-based spectrum.

In the supplemental downlink mode, control of LTE / LTE-A extended to the contention-based spectrum may be transmitted on the LTE uplink (eg, the uplink portion of the bidirectional link 210). One reason to provide downlink capacity offload is because data requirements are largely driven by downlink consumption. In addition, in this mode, since the UE is not transmitting in the unlicensed spectrum, there may be no management impact. There is no need to implement LBT or Carrier Sense Multiplexing Access (CSMA) requirements on the UE. However, it can be implemented on a base station (eg, an eNB), for example, using a periodic (eg, every 10 ms) CCA and / or grab-and-relinquish mechanism aligned with the radio frame boundaries. LBT.

In CA mode, data and control can be transmitted in LTE (for example, bidirectional links 210, 220, and 230), while in LTE / LTE-A (for example, bidirectional links), which can be extended to contention-based shared spectrum 215 and 225). When using LTE / LTE-A based on contention-based shared spectrum, the supported carrier aggregation mechanisms can be classified as mixed-frequency duplex-time-division duplex (FDD-TDD) carrier aggregation or classified as cross-component TDD-TDD carrier aggregation with different symmetry.

FIG. 2B illustrates a diagram 200-a for an example of an independent mode extended to LTE / LTE-A based on contention-based shared spectrum. Diagram 200-a may be an example of a portion of the system 100 of FIG. In addition, the base station 105-b may be an example of the base station 105 of FIG. 1 and the base station 105-a of FIG. 2A, and the UE 115-b may be an example of the UE 115 of FIG. 1 and the UE 115-a of FIG. 2A.

In the example of the independent mode in FIG. 200-a, the base station 105-b can use the bidirectional link 240 to send an OFDMA communication signal to the UE 115-b, and can use the bidirectional link 240 to receive SC-FDMA from the UE 115-b Communication signals. The bidirectional link 240 is associated with the frequency F3 in the contention-based shared spectrum described above with reference to FIG. 2A. Independent mode can be used in non-traditional wireless access scenarios such as access in a stadium (eg, unicast, multicast). Examples of typical service providers for this mode of operation may be stadium owners, cable companies, event organizers, hotels, businesses, or large companies that do not have licensed spectrum. For these service providers, operational configurations for standalone mode can use PCC on contention-based spectrum. In addition, LBT can be implemented on both the base station and the UE.

In some examples, a transmitting device, such as one of the base stations 105, 205, or 205-a described with reference to FIG. 1, 2A, or 2B, or the UE 115, 215, 215- a UE in a, 215-b, or 215-c) may use the gating interval to gain access to a contention-based shared radio frequency band channel (for example, access to an unlicensed radio frequency band physical channel). In some examples, the gating interval may be periodic. For example, the periodic gating interval may be synchronized with at least one boundary of the LTE / LTE-A radio interval. The gating interval may define the application of a contention-based agreement, such as an LBT agreement based at least in part on an LBT agreement specified in the European Telecommunications Standards Institute (ETSI). When using a gating interval that defines the application of the LBT protocol, the gating interval may indicate when the sending device needs to perform a contention procedure (eg, LBT procedure), such as a Clear Channel Assessment (CCA) procedure. The results of the CCA procedure can indicate to the transmitting device whether the channel based on the contention-based shared radio frequency band is available or in use within the gating interval (also known as the LBT radio frame). When the CCA procedure indicates that the channel is available in the corresponding LBT radio frame (for example, "idle" for use), the transmitting device may reserve or use a contention-based shared radio frequency band during part or all of the LBT radio frame The passage. When the CCA procedure indicates that the channel is unavailable (for example, the channel is in use or reserved by another transmitting device), it can prevent the transmitting device from using the channel during the LBT radio frame.

The number and arrangement of the components shown in Figs. 2A and 2B are provided as examples. In practice, the wireless communication system 200 may include additional devices, fewer devices, different devices, or devices arranged in different ways than those shown in FIGS. 2A and 2B.

FIG. 3 is a diagram of an example 300 of wireless communication 310 in an unlicensed radio frequency band according to various aspects of the content of the present case. In some examples, the LBT radio frame 315 may have a duration of 10 milliseconds and include multiple downlink (D) sub-frames 320, multiple uplink (U) sub-frames 325, and two types of Special subframes, S subframe 330 and S ′ subframe 335. S subframe 330 may provide a transition between downlink subframe 320 and uplink subframe 325, and S ′ subframe 335 may provide a transition between uplink subframe 325 and downlink subframe 320. Transitions, and in some instances, transitions between LBT radio frames are provided.

During S 'subframe 335, a downlink idle channel may be performed by one or more base stations (such as one or more of base stations 105, 205, or 205-a described with reference to FIG. 1 or 2). Evaluation (CCA) procedure 345 to reserve a contention-based shared radio frequency band channel on which wireless communication 310 occurs over a period of time. After a successful downlink CCA procedure 345 by the base station, the base station may send a preamble signal such as CUBS (eg, downlink CUBS (D-CUBS 350)) to other base stations or devices (eg, UE , Wi-Fi access point, etc.) provides an indication that the base station has reserved a channel. In some examples, D-CUBS 350 may be sent using a plurality of interleaved resource blocks. Sending the D-CUBS 350 in this manner may enable the D-CUBS 350 to occupy at least a certain percentage of the available frequency bandwidth based on the contention-based shared radio frequency band and meet one or more management requirements (for example, requiring an unlicensed radio frequency band Transmissions occupy at least 80% of the available frequency bandwidth). In some examples, D-CUBS 350 may take a form similar to that of LTE / LTE-A cell-specific reference signals (CRS) or channel status information reference signals (CSI-RS). When the downlink CCA procedure 345 fails, the D-CUBS 350 may not be transmitted.

The S 'sub-frame 335 may include a plurality of OFDM symbol periods (e.g., 14 OFDM symbol periods). The first part of the S 'sub-frame 335 may be used by multiple UEs as a shortened UL (U) period 340. The second part of the S 'sub-frame 335 can be used for the DL CCA procedure 345. The third part of the S 'sub-frame 335 may be used by one or more base stations that successfully contend for access to a contention-based shared radio frequency band channel to transmit D-CUBS 350.

During S subframe 330, there may be one or more UEs, such as one or more of UEs 115, 215, 215-a, 215-b, or 215-c described above with reference to FIG. 1, 2A, or 2B. UE) performs UL CCA procedure 365 to reserve a channel on which wireless communication 310 occurs over a period of time. After a successful UL CCA procedure 365 by the UE, the UE may send preamble signals such as UL CUBS (U-CUBS 370) to provide other UEs or devices (eg, base stations, Wi-Fi access points, etc.) with information about An indication that the UE has reserved a channel. In some examples, U-CUBS 370 may be sent using a plurality of interleaved resource blocks. Sending U-CUBS 370 in this manner may enable U-CUBS 370 to occupy at least some percentage of the available frequency bandwidth in the contention-based radio frequency band and meet one or more management requirements (for example, requiring contention-based Transmission in the radio frequency band occupies at least 80% of the available frequency bandwidth). In some examples, U-CUBS 370 may take a form similar to that of LTE / LTE-A CRS or CSI-RS. When the UL CCA procedure 365 fails, U-CUBS 370 may not be sent.

The S-sub-frame 330 may include a plurality of OFDM symbol periods (eg, 14 OFDM symbol periods). The first part of the S-sub-frame 330 may be used as a shortened DL (D) period 355 by multiple base stations. The second part of the S subframe 330 may be used as a guard period (GP) 360. The third part of S subframe 330 may be used for UL CCA procedure 365. The fourth part of S subframe 330 may be used as an uplink pilot frequency slot (UpPTS) by one or more UEs that successfully contend for access to a channel based on a contention-based radio frequency band or used to send U -CUBS 370.

In some examples, the downlink CCA procedure 345 or the UL CCA procedure 365 may include the execution of a single CCA procedure. In other examples, the DL CCA procedure 345 or the uplink CCA procedure 365 may include the execution of an extended CCA procedure. The extended CCA program may include a random number of CCA programs, and in some examples may include a plurality of CCA programs.

As indicated above, FIG. 3 is provided as an example. Other examples are possible and may differ from the example described in connection with FIG. 3.

FIG. 4 is a diagram of an example 400 of a CCA program 415 executed by a transmitting device when contending for access to a contention-based shared radio frequency band according to various aspects of the content of the present case. In some examples, the CCA program 415 may be an example of the DL CCA program 345 or the UL CCA program 365 described with reference to FIG. 3. The CCA program 415 may have a fixed duration. In some examples, the CCA procedure 415 may be performed according to the LBT-Frame-Based Equipment (LBT-FBE) agreement. After the CCA procedure 415, a channel reservation signal (such as CUBS 420) may be sent, followed by data transmission (for example, UL transmission or DL transmission). For example, a data transmission may have a desired duration 405 of three sub-frames and an actual duration 410 of three sub-frames.

As indicated above, FIG. 4 is provided as an example. Other examples are possible and may differ from the example described in connection with FIG. 4.

FIG. 5 is a diagram of an example 500 of an eCCA program 515 executed by a transmitting device when contending for access to a contention-based shared radio frequency band according to various aspects of the content of the present case. In some examples, eCCA program 515 may be an example of DL CCA program 345 or UL CCA program 365 described with reference to FIG. 3. The eCCA program 515 may include a random number of CCA programs, and in some examples may include a plurality of CCA programs. Therefore, the eCCA program 515 may have a variable duration. In some examples, the eCCA program 515 may be executed according to an LBT-Load Based Equipment (LBT-LBE) agreement. The eCCA procedure 515 may provide a greater likelihood of winning contention for access to a contention-based shared radio frequency band, but potentially at the cost of shorter data transfers. After eCCA procedure 515, a channel reservation signal (such as CUBS 520) can be sent, followed by data transmission. For example, a data transmission may have a desired duration 505 of three sub-frames and an actual duration 510 of two sub-frames.

As indicated above, FIG. 5 is provided as an example. Other examples are possible and may be different from the example described in connection with FIG. 5.

FIG. 6 illustrates a block diagram of a design of a base station 105 (eg, an eNB) and a UE 115 (which may be one of the base station / eNB and one of the UEs in FIG. 1). The base station 105 may be equipped with antennas 634a to 634t, and the UE 115 may be equipped with antennas 652a to 652r. At the base station 105, the sending processor 620 may receive data from the data source 612 and control information from the controller / processor 640. The control information may be directed to a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid automatic repeat request indicator channel (PHICH), a physical downlink control channel (PDCCH), and the like. The data may be for the physical downlink shared channel (PDSCH), etc. The sending processor 620 may process the data and control information (for example, encoding and symbol mapping) to obtain the data symbol and the control symbol, respectively. The transmit processor 620 may also generate reference symbols (eg, for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal). A transmit (TX) multiple-input multiple-output (MIMO) processor 630 may spatially process (e.g., precode) these data symbols, control symbols, and / or reference symbols (if any), and may provide a modulator (MOD) 632a to 632t provide output symbol streams. Each modulator 632 may process a respective output symbol stream (eg, for OFDM, etc.) to obtain an output sample stream. Each modulator 632 may further process (eg, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from the modulators 632a to 632t may be transmitted via the antennas 634a to 634t, respectively.

At the UE 115, the antennas 652a to 652r can receive downlink signals from the base station 105 and can provide the received signals to the demodulator (DEMOD) 654a to 654r, respectively. Each demodulator 654 can condition (eg, filter, amplify, down-convert, and digitize) the respective received signal to obtain input samples. Each demodulator 654 may further process these input samples (eg, for OFDM, etc.) to obtain received symbols. The MIMO detector 656 can obtain the received symbols from all the demodulators 654a to 654r, perform MIMO detection on the received symbols (if any), and provide the detected symbols. The receiving processor 658 may process (eg, demodulate, deinterleave, and decode) the detected symbols, provide the data slot 660 with decoded data for the UE 115, and provide the controller / processor 680 with decoded control information .

On the uplink, at the UE 115, the sending processor 664 may receive and process (e.g., for PUSCH) data from the source 662 and receive control information (e.g., for PUCCH) from the controller / processor 680 . The transmit processor 664 may also generate reference symbols for reference signals. The symbols from the transmit processor 664 can be pre-encoded (if any) by the TX MIMO processor 666, further processed by the demodulators 654a to 654r (eg, for SC-FDM, etc.) and sent to the base台 105。 Taiwan 105. At base station 105, uplink signals from UE 115 can be received by antenna 634, processed by modulator 632, detected by MIMO detector 636 (if any), and received by processor 638 Further processing is performed to obtain decoded data and control information sent by the UE 115. The processor 638 may provide decoded data to the base station data slot 646 and provide the controller / processor 640 with decoded control information.

Controllers / processors 640 and 680 may direct operations at base station 105 and UE 115, respectively. The controller / processor 640 and / or other processors and components at the base station 105 may perform or direct the execution of various processes for the techniques described herein. The controller / processor 680 and / or other processors and components at the UE 115 may also perform or direct the execution of the functional blocks shown in FIGS. 12-17 and 20-22 and / or for the techniques described herein Other processing. The memories 642 and 682 can store data and codes for the base station 105 and the UE 115, respectively. The scheduler 644 may schedule the UE for data transmission on the downlink and / or uplink.

A device, such as a UE, may have multiple antennas (N) for receiving and / or transmitting signals. Devices can divide the use and allocation of antennas for specific radio access technologies (RATs) (such as LTE, Wi-Fi, etc.), for specific carrier frequencies, or both. For example, in the case of CA, a device may use a fixed number of antennas for one carrier, or when the device supports Wi-Fi and other technologies such as LTE, it may use a fixed number of antennas for Wi-Fi. In one example, the UE may have four antennas and allocate two antennas for Wi-Fi communication and two antennas for LTE communication. Devices such as UEs can also dynamically or semi-statically select the number of antennas (antenna selection) for a technology or a carrier. In this dynamic or semi-static scheme, sharing or selection can be triggered by specific measurement results (such as channel quality indicator (CQI), reference signal received power (RSRP), etc.).

Communication networks (such as LTE) may have a frequency division multiplexing (FDM) implementation and a time division multiplexing (TDM) implementation. Sharing the options in the FDM implementation is not really sharing different antennas, but sharing the spectrum received via the antennas. For example, the UE may use a duplexer / switch to use all antennas simultaneously for different air interfaces. The duplexer / switch acts as a filter by filtering out unwanted frequencies. However, in such FDM sharing schemes, since the signals are filtered out, there is usually a large loss of signal strength. Such losses can also increase with higher frequency bands. TDM implementations can actually use or allocate separate antennas for each air interface / technology. Therefore, when communication via such an air interface / technology is not in use, those antennas allocated or designated for unused communication can be shared with other air interfaces / technology. Various aspects of the content of this case involve a communication system using a TDM implementation.

Due to the limited frequency dimension of narrowband, NB wireless communication involves unique challenges. An example of such NB wireless communication is NB-IoT, which is limited to a single RB of the system bandwidth (for example, 180 kHz). Another example of NB wireless communication is eMTC, which is limited to six RBs of the system bandwidth. NB communications can be deployed in "stand-alone" systems, for example, in dedicated spectrum. Multiple users can take advantage of narrowband. Although only some UEs may be active at a particular time, NB communication should support this multi-user capacity.

In addition, NB communications may need to provide in-depth coverage by considering devices in environments that require different levels of coverage enhancement (CE). For example, some devices may require as much as 20 dB of CE, which results in larger uplink transmission time interval (TTI) accompanying and also limits time resources.

NB-IoT communication can also involve large cell radii, for example, as large as about 35 km. Therefore, communication can involve long delays, such as 200 µs, which can use a long cyclic prefix (CP) length.

NB communication using eMTC (eg, with class 0, low-cost MTC UE) involves similar challenges. The MTC UE can be implemented with a reduced peak data rate (for example, a maximum of 1000 bits for a transmission block size). In addition, the MTC UE may be limited to supporting rank 1 transmission and / or having 1 receiving antenna. According to the LTE standard, when the MTC UE is half-duplex, the MTC UE can have a loose handover time (switching from transmission to reception or switching from reception to transmission) compared to traditional UEs or non-MTC UEs. For example, a non-MTC UE may have a handover time on the order of 20 µs, while an MTC UE may have a handover time on the order of 1 ms.

The MTC UE may monitor the DL control channel in the same manner as a non-MTC UE, such as monitoring a wideband signal, monitoring both PDCCH and EPDCCH, and so on. Can support additional MTC enhancements. Although MTC UE works in narrow frequency band, MTC UE can also work in wider system bandwidth (for example, 1.4 / 3/5/10/15/20 MHz). For example, the MTC UE can operate in a system bandwidth of 1.4 MHz and can use 6 resource blocks (RBs). In addition, MTC UEs can have enhanced coverage of up to 15 dB.

In eMTC with extended coverage support, one or more channels can be attached (eg, repeated) in the time domain. Specifically, the accompanying M-PDCCH may be transmitted using multiple sub-frames. The eNB may allocate resources for the M-PDCCH according to the requirements for the ePDCCH within the narrow frequency band on which the MTC UE operates.

The aspects described in this article provide wireless communication between base stations and UEs with different bandwidths. The communication may include IoT communication, for example, NB-IoT, eMTC, and so on. These aspects can realize such wireless communication between a base station and a UE that have different bandwidths while operating in an unlicensed or shared spectrum.

There are various rules regarding wireless communication in unlicensed spectrum. These rules can vary from country to country.

For example, in the United States, there may be rules regarding frequencies used for unlicensed wireless communications, such as between 2400-2483.5 MHz. Digital modulation for such unlicensed wireless communication may include bandwidth limitation, transmission power limitation, and the like. For example, wireless communications on unlicensed spectrum can be subject to a minimum bandwidth of 500 KHz, a maximum transmission power of 30 dBm, a maximum effective isotropic radiated power (EIRP) of 36 dBm, and a maximum transmit power spectral density of 8 dBm / 3 KHz ( PSD). For digital modulation operation, there may be no dwell time limitation.

There may also be additional rules regarding frequency hopping operation. In the United States, for example, hopping channels with a maximum bandwidth of 25 kHz and 20 dB allow frequency hopping in the unlicensed spectrum. In one example, when the output power is less than or equal to 21 dBm, the maximum value can be 25 kHz and 2/3 * 20 dB bandwidth. Jumps may be required to include pseudo-randomly determined frequencies and the uniform occupation of each channel over a complete hop period. Therefore, although a pattern can be used, it can be required that the pattern is pseudo-random. The receiver can have an input bandwidth that matches the transmitter's hop channel bandwidth, and can shift the frequency in synchronization with the transmitted channel. The structure of these rules can vary depending on the number of channels used for frequency hopping. For example, for frequency hopping using at least 15 channels, the maximum dwell time can be 0.4 s. This avoids transmissions on specific channels (assuming a minimum of 15 channels are used for frequency hopping). If at least 75 channels are used, the maximum transmission power can be 30 dBm. If less than 75 channels are used, the maximum transmission power can be 21 dBm. Smart hops can be performed, for example, to allow avoiding some channels per device. However, coordination between multiple devices may not be allowed.

Hybrid systems can use a combination of both frequency hopping and digital modulation techniques. This hybrid system can include a maximum transmit power spectral density (PSD) of 8 dBm / 3 KHz. Similarly, frequency hopping operation of a hybrid system can have a dwell time limit of 0.4 s per channel. Therefore, the occupancy at any frequency can be specified to not exceed 0.4 s. The number of skip channels can be unlimited.

In Europe, there are rules for non-self-adjusting frequency hopping and self-adjusting frequency hopping.

For non-self-adjusting frequency hopping, there is a maximum transmission power of 20 dBm and a minimum hopping band of 100 kHz. For example, medium utilization (MU) can be limited to less than 10%, where MU = (P / 100 mW) * DC. P is the transmission power. DC is the duty cycle, which can be stated by the manufacturer based on observations during the maximum stay period.

In Europe, there may be a maximum on-time of 5 ms and a requirement for a gap of at least 5 ms between transmissions.

There can also be a 15 ms dwell time at a given frequency in 15 * N ms. In the first option, the frequency hopping of each of the hop sets may be occupied at least 1 / (4N * dwell time) period. In the second option, the occupation probability of each frequency can be limited to between 25% of 1 / N and 77% of 1 / N. N is the number of frequency hopping used.

The occupied channel bandwidth can be specified to include 99% of the transmitted power. If the EIRP is greater than 10 dBm, the nominal channel bandwidth can be less than or equal to 5 MHz.

The device may send on at least one frequency hopping while blacklisting other frequency hopping. Blacklisted frequencies are considered active for calculating MU. The device may be required to occupy this frequency for the duration of the dwell time.

For self-adjusting frequency hopping, there can be a maximum transmit power of 20 dBm and a 0.4 s dwell time within 0.4 s * N, where N is greater than the maximum of 15 and 15 BW (MHz). The minimum hopping bandwidth of 100 kHz can work at 70% of the frequency band. The minimum frequency occupancy may be 1 DWT in a period not exceeding 4 * dwell time (DWT) * N. Transmission can be on at least two frequencies.

At least one of two detection and avoidance (DAA) methods can be used. The Listen-Before-Let (LBT) method is an example of the DAA method. For LBT-based DAAs, CCA can be based on a 0.2% observation period at the beginning with a minimum dwell time of 20 µs. When the signal is above the energy detection (ED) level, the frequency can be skipped and not counted according to the 15-channel requirement. If the channel is skipped, the device can wait without sending. As another option, the device can perform eCCA with 1% to 5% of the channel occupation time. Channel occupancy time can be 60 ms followed by a maximum (5%, 100 µs) (which means 5% of channel occupancy time (for example, 3 ms for 60 ms) or 100 µs Is the largest) idle period. When using LBT-based DAA, if a signal is detected, a hop to the next frequency in the hopping sequence can be performed (assuming that the time for the maximum dwell time is respected).

Another DAA method may involve evaluating the channel for signal presence, and avoiding those frequencies within the maximum value of (1 s, 5 * N * COT) when the channel is found to be busy, where COT is the channel occupation time. The maximum COT can be 40 ms, and the idle period can have a maximum value after COT (5% of COT, 100 µs).

For wideband modulation, there can be a maximum transmit power of 20 dBm, a maximum transmit PSD of 10 dBm / MHz, and a maximum bandwidth of 20 MHz. The transmission sequence can be less than 10 ms, where the minimum transmission gap = max (upcoming transmission sequence, 3.5 ms). MU can be similar to unlicensed spectrum. (MU) can be limited to less than 10%, where MU = (P / 100 mW) * DC. Both LBT DAA and non-LBT DAA can be used.

Other countries may have different rules regarding wireless communications in the unlicensed spectrum.

Base stations and UEs with different bandwidths

The aspects described in this article implement wireless communication in the unlicensed spectrum between base stations and UEs with different bandwidths. Table 1 illustrates a table of examples of possible bandwidth combinations between eNBs and UEs in the unlicensed spectrum. Table 1

In one example, the base station may be a broadband eNB or other base station capable of performing broadband communication, and the UE may be an NB UE. For example, the UE may have a bandwidth of 1.08 MHz. The eNB may be the base stations 105, 105-a, 105-b, and the UE may be the UEs 115, 115-a, 115-b.

The eNB may perform an LBT operation before transmitting, and the UE may transmit to the eNB without performing the LBT operation. 4 and 5 illustrate example aspects of example LBT operations. FIG. 7 illustrates an example frame structure 700 for communication between a broadband eNB and a NB UE. As shown, at the beginning of each frame, the eNB may execute LBT 702. The eNB may then send within the duration of the frame. The duration of the LBT portion 702 of the frame, the uplink (UL) portion 706 of the frame, and the downlink (DL) portion 704 of the frame may be configurable by the eNB.

20 MHz eNBs can be deployed using digital modulation mode or mixed mode. Frequency hopping mode can be used to deploy eNBs up to 5 MHz. Therefore, in one example, the eNB may have a 5 MHz bandwidth and the UE may have a 1.4 MHz bandwidth.

In one example, the frame structure 700 of FIG. 7 may have a duration of 40 ms. In this example, up to 10 frames can be sent on each frequency hop, for example, within a maximum dwell period of 400 ms on the frequency. The number of frames can be a function of the bandwidth supported by the eNB. For example, this is because the number of narrow frequencies in a given bandwidth on which the UE hops is a function of the eNB bandwidth.

Since the duration of LBT 702, DL part 704, and UL part 706 can be configured by the eNB, for a 40 ms frame, for UL heavy communication, the DL duration can be 8 ms, and the UL duration can be 30 ms, and The LBT duration can be 2 ms. For DL heavy communication, the DL duration can be 28 ms, the UL duration can be 10 ms, and the LBT duration can be 2 ms.

For example, to meet regulatory requirements, a 5% idle period may be important. To implement the idle period, the UL duration 706 of the frame may be applied for the idle period. Therefore, when there are 2 UL sub-frames in the frame duration, the idle period of the eNB can be satisfied.

The initial CCA requirements for LBT operation at 702 may have an observation period of at least 40 ms * 0.002. In the example of a 40 ms frame, the CCA observation period can be 80 µs. However, in another example, a channel observation period of at least 200 µs can be used to cover the 2-symbol retuning gap used by the UE in eMTC applications.

The LBT program may include performing CCA or eCCA, as described in connection with FIGS. 4 and 5. FIG. 8 illustrates a frame structure 800 with an instance duration of an initial CCA 802 and an extended CCA 804.

If the base station sends on a previous frame or if the current frame is the first frame in frequency, the base station can try the initial CCA 802 in the first 200 µs of the frame. If the initial CCA 802 is successful, the base station can send a reserved signal within 1.8 ms, and then can start frame transmission, such as 704, 706. If the base station did not send on the previous frame of the frequency, the base station can wait until the CCA position for the next frame boundary and can try eCCA again.

If the initial CCA 802 fails, the base station can start performing eCCA for a duration between, for example, 400 µs and 1.8 ms. If the eCCA is unsuccessful, the base station can wait until the CCA position for the next frame boundary, and can try the eCCA again.

The total base station transmission time can be 1.8 ms / 0.05 = 36 ms. Therefore, for each frame, the maximum DL duration 704 may be 36 ms, and the minimum UL duration 706 may be 4 ms. 4 ms minimum UL provides base station idle period.

The frame structure may be different in the first frame or multiple initial frames on a given frequency hopping. For example, when a base station wins media access via CCA / eCCA, there may be a minimum number of sub-frames in each short burst, and these sub-frames may serve as anchor DL sub-frames that are always present. FIG. 9 illustrates an example frame structure 900 including DL portions 904a, 904b with different durations and UL portions 906a, 906b with different durations. Although the LBT sections 902a, 902b can be configured in different ways for different frames, in FIG. 9, the LBT sections 902a, 902b are the same. Similarly, the idle periods 908a, 908b are shown as having the same duration.

Therefore, the base station has the ability to configure the DL duration 904a, 904b and the UL duration 906a, 906b based on the information to be transmitted. For example, the DL heavy frame can carry more DL and UL authorizations or network signals to pass messages (such as paging and system information block (SIB)).

Cascading base station transmissions (eg, in DL section 904a) has the potential to reduce UE power consumption by reducing the amount of time the UE monitors the media. Channel estimation gain can also be achieved due to longer transmissions on a single frequency or due to transmissions without gaps.

In one example, the DL-UL ratio of each of the frames is configurable over the long term. For example, the DL-UL ratio may be signaled via an RRC signal transmission or via an indication in the SIB.

You can define the allowed frame structure, store the allowed frame structure in a table, and so on. Subsequently, the base station can signal the adopted frame structure to the UE. For example, the base station can use the SIB to signal the frame structure used to the UE. This enables the base station to change the frame structure after each SIB modification cycle.

As mentioned above, the UE may send UL communications during the UL duration (eg, 706, 906a, 906b) without performing LBT. Therefore, the UE may send to the base station when it receives the authorization from the base station (eg, in the DL duration 704, 904a, 904b). The base station transmission is detectable for all UE common signals (eg, PSS / SSS). However, UE transmission detection at the base station can consume a large management burden. This management burden can be reduced by removing the standard for performing LBT for the UE. Sending UL communications from the UE to the base station also reduces power consumption due to simpler overall operations. Rules can impose stricter constraints on transmission characteristics for transmissions that are sent without LBT.

For example, European rules may require 5 ms on time followed by 5 ms off time. The on time is accumulated at any frequency. In 4 * 15 * N ms, there can be a maximum dwell time of 15 ms at any given frequency, where N is the number of frequency hopping.

Therefore, the UE can use a frame structure including a transmission unit having a 5 ms on period and a 5 ms off period. This enables the UE to meet regulatory compliance by design. This modular structure of the transmission unit allows changes to be made when no shutdown period is required in the area. FIG. 10 illustrates an example UL transmission unit 1000 having a first portion including a 5 ms on period 1002 followed by a second portion including a 5 ms off period 1004. The UL duration (eg, 706, 906a, 906b) may be divided into a plurality of transmission units 1000. Each frame can include 1, 2, or 3 UL transmission units 1000 (for example, 10 ms, 20 ms, or 30 ms for UL transmission) according to the configuration selected by the base station or based on the specification. This can simplify the signal transmission mode and the UE procedure, because an integer number of UL transmission units can be included in the signal frame. In order to use the capacity of the wideband base station efficiently, different UEs can be multiplexed in each transmission unit.

FIG. 10 illustrates an example in which a transmission unit of a second UE (UE 2) may be configured to be opposite to a transmission unit of a first UE (UE 1). For example, in the first 5 ms, the transmission unit of UE 1 has an on period 1002, and the transmission unit of UE 2 has an off period 1006. Similarly, the second 5 ms of the transmission unit 1000 is an off period 1004 for UE 1 and an on period 1008 for UE 2. Therefore, in order to efficiently use the resources at the base station, the on / off portions of the transmission units of different UEs can be interleaved.

Some aspects may include UL data channel accompanying for the UE. For example, during a 5 ms period in each transmission unit of the UE, the same redundancy version (RV) and scrambling sequence may be applied to DMRS and PUSCH.

For UL PUSCH scheduling, when the UE needs less than 5 subframes, it can schedule PUSCH in one transmission unit (for example, 1000). As shown in FIG. 10, other UEs may be multiplexed on the remaining resources (for example, during the shutdown period 1004 and the like). When the UE needs more than 5 sub-frames for its UL transmission, the base station can schedule PUSCH for the UE in multiple transmission units 1000. The UL start delay can also be specified from the base station to the UE according to the transmission unit 1000.

FIG. 11 illustrates the use of narrowband UEs (eg, 115, 115-a, 115-b, 1350, 1902, 1902 ', 2250) at wideband base stations (eg, 105, 105-a, 105-b, 1950, 2202, 2202 ') Example frame structure 1100 for channel hopping. The frame structure 1100 includes an LBT portion 1102 at the beginning of the frame, and the base station may perform CCA / eCCA during the LBT portion 1102. The LBT portion 1102 may correspond to an LBT duration 702, 902a, 902b. The frame structure 1100 includes a DL part 1104 and a UL part, where the UL part includes three transmission units 1106, 1108, and 1110. The DL portion 1104 may correspond to DL durations 704, 904a, 904b. The UL portion including the transmission units 1106, 1108, 1110 may correspond to a UL duration 706, 906a, 906b.

The frame structure 1100 includes multiple NB channels, for example, NB 1, NB2, NB3, and NB4. As described in this case, the base station can transmit or receive over a wider bandwidth than the UE with which the base station communicates. For example, the UE may only be able to send or receive on a single NB channel, while the base station is able to send and receive on multiple NB channels.

The NB UE can use the UL frequency hopping mode within the channel occupation of the wideband base station. In the first example, the UE may send UL transmission to the base station using frequency hopping between transmission units in the frame, as shown in FIG. 11. Figure 11 illustrates an example for 25 RB eNB and 5 MHz. In the example in FIG. 1, the first UE sends UL transmissions in NB1 of transmission unit 1, NB2 of transmission unit 2, and NB4 of transmission unit 4. Therefore, within the channel occupation of the base station during the frame period, the UE skips the NB frequency channel within the base station bandwidth. After the frame, the UE can jump to different frequencies according to the corresponding frequency hopping performed by the base station. In another example, the UE may use the frequency hopping between frames to send UL transmissions to the base station, where the same NB is used in each frame. For example, before moving to a new NB channel, the UE may send a maximum of 3 UL transmission units in a given NB channel.

The UE can perform two-level frequency hopping between NB channels. First, the UE may use frequency hopping with a fixed pattern (for example, similar to the hopping pattern of FIG. 11) to hop within the NB channel of the base station. Second, the base station and the UE may hop between the entire unlicensed band, for example, according to any rule requirements for hopping.

Before performing the second hop (in the second hop, the base station and the UE hop to a new frequency), the number of frames per frequency may be a function of the number of DL sub-frames and the number of narrow frequencies in the frame structure, The UE can hop on such narrow frequencies within the channel occupation of the base station.

The number of narrow bands can be defined for IoT (eg, NB-IoT and / or eMTC). For example, for eMTC, the bandwidths of 5 MHz, 10 MHz, and 20 MHz generate 4 narrowbands, 8 narrowbands, and 16 narrowbands respectively, and the UE can perform on these narrowbands within the channel occupation of the base station. jump. FIG. 11 illustrates 4 narrow bands on which the UE can hop. In eMTC, only two narrowbands can be provided for all channels, and up to 4 channels can be only for PDCCH / PDSCH.

In the first example, for a 5 MHz base station bandwidth, each frame of 4 frames is 160 ms, which corresponds to 12 UL transmission units per frequency hopping across all frames. The UE can use 3 transmission units per narrowband, so it spans 4 frames for a total of 12 transmission units.

In a second example, for a base station with a 10 MHz bandwidth, 320 frames per frequency of 8 frames is 320 ms, which corresponds to 24 UL transmission units per frequency hopping across all frames. The UE can use 3 transmission units per narrowband, so it spans 8 frames for a total of 24 transmission units.

Broadband base stations provide higher capacity at a single base station to serve multiple UEs simultaneously. This reduces the number of base stations that need to be deployed, and therefore reduces the cost required to serve a given number of users. The broadband base station also achieves a higher dwell time per NB channel, because the UE can use the base station's frequency band occupation to hop in the frequency band. By using different hopping patterns at different base stations, the network is allowed to avoid interference from transmissions in other cells. For example, the N frequency hopping used by the base station implies that N different base stations in the area can coexist without any interference in the controlled environment. The choice of N may depend on the rule or bandwidth selected by the base station. The selection of N may also be based on the minimum number of frequencies that the UE needs to send. Although different DL / UL configurations in the frame can be used for each base station, hopping can be used to avoid interference from nearby base stations. This enables different base stations to have different DL-UL configurations in each frame without any mixed interference scenarios.

As shown in Figures 7, 9 and 11, the DL transmission from the base station can be started with LBT at the beginning of the frame. This may affect MPDCCH repetition. For small repetitions, the MPDCCH can be sent in one frame. For a larger number of repetitions, the MPDCCH can span multiple frames, each frame having an independent LBT. It may be simpler for the base station to send all repetitions of the DL grant in one frame. Some DL heavy frames (for example, similar to 904a) may be sufficient to implement this option without affecting coverage. In different examples, when the MPDCCH spans multiple frames, the MPDCCH may be turned on via LBT or may be postponed, for example, until the next frame sent by the base station. For these two options, the UE needs to be able to accurately determine whether the base station is transmitting, so that it can softly combine information across the frame. The delayed MPDCCH may affect other UE schedules because the UE may be awake only during the discontinuous reception (DRX) on period.

Similarly, MPDSCH transmissions can span multiple frames. If the UE receives a DL grant from the base station, the base station has a similar option to delay MPDSCH transmission or use LBT procedures to start MPDSCH transmission.

The choice between enabling or deferring the MPDCCH or MPDSCH may be made dynamically by the base station or may be specification based. For example, the base station may dynamically select whether to enable or postpone the MPDCCH or MPDSCH based on the interference environment, based on the possibility that the UE may lose transmission from the base station, and / or the possibility that the UE incorrectly detects a non-existent base station transmission . Dynamic selection can be based on how reliably the UE can detect whether base station transmission is on or off.

In contrast, LBT may not have a major impact on UL transmissions such as MPUCCH or MPUSCH. The UE may send to the base station without performing the LBT operation. The UE can send MPUCCH and MPUSCH in the frame, even if the base station is not transmitting during the DL sub frame. For MPRACH, when allocating resources via a cell-specific configuration, the UE may attempt RACH transmission at a specified time (eg, without LBT).

FIG. 12 is a flowchart 1200 of a method of wireless communication. The method may be performed by a base station (eg, base station 105, 105-a, 105-b, device 1302/1302 ') wirelessly communicating with a UE (eg, UE 115, 115-a, 115-b, 1350) carried out. The alternative aspects in Figure 12 are shown using dashed lines. Wireless communications can include eMTC in license-free or shared spectrum. The base station may perform LBT operations at the beginning of the frame and before sending the downlink communication to the UE, for example, as described in connection with FIGS. 4, 5 and 8. The base station can use the first bandwidth to send downlink communications to the UE on the unlicensed spectrum, and can use the second, narrower bandwidth to receive uplink communications from the UE, for example, in conjunction with Figures 7, 9 and 11 described. Therefore, the base station can use the narrowband to communicate with the narrowband UE, and can also communicate as a wideband base station.

As shown in FIG. 12, at 1202, the base station performs a dual CCA procedure for the frame. When the base station sends on the previous frame or before the base station sends the frame as the first frame on the frequency, the dual CCA procedure at 1202 may be performed, for example, as described in conjunction with FIG. 8. The dual CCA program may include the first type of CCA program. When the first type of CCA program is unsuccessful, the first type of CCA program is followed by the second type of CCA program. Therefore, at 1208, the base station may perform a first type of CCA procedure. At 1210, the base station can decide whether the first type of CCA procedure was successful. If unsuccessful, the base station may perform a second type of CCA procedure at 1214.

At 1204, when at least one CCA procedure in the dual CCA procedure is successful, the base station may transmit during the frame. At 1206, when both CCA procedures in the dual CCA procedure are unsuccessful, the base station can suppress transmission during the frame.

The first type of CCA program may include CCA, and the second type of CCA program may include eCCA. Therefore, at 1208, the base station may perform CCA in the first time period, and when CCA at 1210 is unsuccessful, at 1212, eCCA is performed in the second time period. For example, the second time period for performing eCCA may be longer than the first time period for performing CCA, for example.

When the CCA is determined to be successful at 1210, the base station may send a reserved signal at 1216 and may follow the reserved signal at 1218 and send a frame transmission. Similarly, when the CCA is unsuccessful, but it is determined at 1214 that the eCCA is successful, the base station may send a reserved signal at 1216 and may send a frame transmission after 1218 following the reserved signal. When eCCA is successful, the reserved signal length is based on the time from the successful eCCA to the frame boundary. Then, the frame transmission starts. Therefore, the reserved signal fills the gap between the eCCA and the frame boundary.

When both CCA and eCCA are unsuccessful, the base station may wait at 1220 until the next CCA position at the next frame boundary. Therefore, at 1222, the base station may perform a second type of CCA procedure, such as eCCA, at the next CCA location.

The first transmission time corresponding to the first type of CCA program at 1208 may be independent of the first duration of the first type CCA, and the second transmission time corresponding to the second CCA program at 1212 may be based on the second Second duration of type CCA. Therefore, the transmission time for CCA can be independent of the CCA duration, while for eCCA, the transmission time is a function of the eCCA duration. If the downlink transmission time is small, the eCCA duration can be small. In order to align the start transmission time for different frame structures, each of which has a different downlink duration, a variable length of reserved signal time may be applied. Alternatively, the eCCA may be started later, so that the end of the eCCA is consistent with the border of the sub-frame where the data transmission starts.

The base station can receive UL communication from the UE from the UE without performing LBT operation. Therefore, the frame may include an LBT portion (eg, 702, 902a, 902b), a DL portion (eg, 704, 904a, 904b); and a UL portion (eg, 706, 906a, 906b). After performing the LBT operation, the eNB may send downlink communications or receive uplink communications within the duration of the frame, as shown in FIG. 7. The LBT operation duration, downlink duration, and uplink duration of the frame may be configurable by the eNB. To configure these durations, the eNB may choose a frame structure with a defined downlink duration and a defined uplink duration. The eNB may then signal the selected frame structure to the UE.

FIG. 13 is a conceptual data flow diagram 1300 illustrating the data flow between different units / components in the example device 1302. The device may be a base station (for example, base stations 105, 105-a, 105-b). The apparatus includes a receiving component 1304 configured to receive an uplink communication from at least one UE 1350, and a transmission component 1306 configured to send a DL communication to at least one UE 1350. Wireless communications can include eMTC in license-free or shared spectrum.

The device may include a dual CCA component 1308 configured to execute a dual idle CCA procedure for a frame, where the dual CCA procedure includes a first type of CCA procedure (eg, CCA) when the first type of CCA procedure is unsuccessful The first type of CCA program is followed by the second type of CCA program (for example, eCCA). Accordingly, the dual CCA component 1308 may include a CCA component 1310 and an eCCA component 1312. The apparatus may include a CCA decision component 1314 configured to determine whether the first type of CCA program and / or the second type of CCA program is successful. When one of these types of CCA procedures is successful, the CCA decision component 1314 may be configured to instruct a transmission component (eg, any of 1306, 1316, or 1318) to transmit during the frame. When both CCA procedures of the dual CCA procedure are unsuccessful, the CCA decision component 1314 may instruct the transmission to be suppressed during the frame. The device may include: a reservation component 1316 configured to send a reservation signal when a CCA procedure in the CCA procedure is successful; and a frame transmission component 1318 configured to send a frame following the reservation signal. transmission. When both CCA and eCCA are unsuccessful, the CCA decision component may be configured to cause the device to wait until the next CCA location at the next frame boundary, and configured to execute eCCA at the next CCA location.

The device may include additional components that execute each of the blocks of the algorithm in the flowchart of FIG. 12 described above. As such, each block of the flowchart of FIG. 12 described above may be performed by components, and the device may include one or more of those components. A component may be specifically configured to execute the program / algorithm, implemented by a processor configured to execute the program / algorithm, stored in a computer-readable medium for implementation by the processor , Or one or more hardware components of some combination thereof.

FIG. 14 is a diagram 1400 illustrating an example of a hardware implementation of a device 1302 'employing the processing system 1414. The processing system 1414 may be implemented using a bus architecture (typically represented by the bus 1424). The bus 1424 may include any number of interconnected buses and bridges, depending on the particular application and overall design constraints of the processing system 1414. The bus 1424 will include one or more processors and / or hardware components (represented by the processor 1404), components 1304, 1306, 1308, 1310, 1312, 1314, 1316, 1318, and computer-readable media / memory The various circuits of the 1406 are linked together. The bus 1424 can also connect various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well-known circuits in the field to which the present invention belongs, and will not be described further.

The processing system 1414 may be coupled to a transceiver 1410. The transceiver 1410 is coupled to one or more antennas 1420. The transceiver 1410 provides a unit for communicating with other devices via a transmission medium. The transceiver 1410 receives signals from one or more antennas 1420, extracts information from the received signals, and provides the extracted information to the processing system 1414 (specifically, the receiving component 1304). In addition, the transceiver 1410 receives information from the processing system 1414 (specifically, the transmission component 1306), and generates a signal to be applied to one or more antennas 1420 based on the received information. The processing system 1414 includes a processor 1404 coupled to a computer-readable medium / memory 1406. The processor 1404 is responsible for general processing, including execution of software stored on a computer-readable medium / memory 1406. When the processor 1404 executes software, the software causes the processing system 1414 to perform the various functions described above for any particular device. The computer-readable media / memory 1406 may also be used to store data manipulated by the processor 1404 when executing software. The processing system 1414 also includes at least one of components 1304, 1306, 1308, 1310, 1312, 1314, 1316, 1318. The component may be a software component executing in the processor 1404, resident / stored on a computer-readable medium / memory 1406, one or more hardware components coupled to the processor 1404, or some combination thereof . Processing system 1414 may be a component of base station 105 and may include at least one of TX processor 620, RX processor 638, and controller / processor 640 and / or memory 642.

In one configuration, the device for wireless communication 1302/1302 'includes a unit for executing a dual idle channel assessment (CCA) program for a frame, a unit for transmitting, a unit for suppressing transmission, and A unit that sends a reserved channel when CCA / eCCA is successful, and a unit that sends a frame transmission following the reserved signal. The above-mentioned units may be one or more of the above-mentioned components of the device 1302 and / or the processing system 1414 of the device 1302 'configured to perform the functions described by the above-mentioned units. As described above, the processing system 1414 may include a TX processor 620, an RX processor 638, and a controller / processor 640. As such, in one configuration, the aforementioned units may be a TX processor 620, an RX processor 638, and a controller / processor 640 configured to perform the functions recited by the aforementioned units.

FIG. 15 is a flowchart 1500 of a method of wireless communication. The method may be performed by a UE (eg, UE 115, 115-a, 115-b, 1350, device) that wirelessly communicates with a base station (eg, base station 105, 105-a, 105-b, device 1302/1302 ') 1602, 1602 '). Wireless communication may include eMTC. Alternative aspects of the method are shown using dashed lines. At 1508, the UE may divide the uplink duration of each frame into multiple transmission units for each frequency, where the frame includes an integer number of transmission units, for example, as described in conjunction with FIG. 10.

At 1510, the UE sends uplink communications based on multiple transmission units, where each transmission unit includes at least one on period and at least one off period corresponding to each of the plurality of frequencies, wherein during the on period , The UE sends uplink communications on the corresponding frequency, and during the off period, the UE suppresses sending uplink communications on the corresponding frequency.

In one example, each transmission unit may include multiple on periods and multiple off periods. The base station can configure the opening period and the closing period for each frame type. Therefore, at 1502, the base station can receive the configuration of the on period / off period from the base station. In another example, the opening period and the closing period may be specified for each frame type.

In one example, each on period may be smaller than each off period. In another example, each on period may be the same length as each off period. For example, each on period may include a length of 5 ms, and each off period may include a length of 5 ms.

The transmission unit of the UE may be multiplexed with the second transmission unit of the second UE, wherein the on-period of the transmission unit of the UE corresponds to the second off-period of the second transmission unit of the second UE, and the off-period of the transmission unit of the UE Corresponds to the second on period of the second transmission unit of the second UE, for example, as described in connection with FIG. 10. As described in conjunction with FIG. 10, the uplink duration of each frame can be divided into multiple transmission periods. Although FIG. 10 illustrates an example with two periods, a different number of transmission periods may be provided in the uplink duration. Therefore, in an example with three UEs, there may be three periods, and each UE may have one on period and the remaining two periods as the off period. In order to use the frequency spectrum frequently, the UE can be interleaved during the ON period. In an example with four UEs, each UE may be configured with a single on-period, followed by three off-periods in order to interleave the on-periods of the four UEs with each other.

At 1510, the UE may send a communication without executing the LBT procedure. In another example, at 1510, the UE may obey the LBT procedure in each transmission unit to send uplink communications. In yet another example, at 1510, the UE may obey the LBT procedure to send uplink communications in each on period.

At 1504, the UE may receive the uplink schedule from the base station in the scheduling unit based on the transmission unit. At 1510, an uplink communication may be sent based on the uplink schedule received at 1504.

At 1506, the UE may receive the uplink start delay in the scheduling unit based on the transmission unit. At 1510, an uplink communication may be sent based on the uplink start delay received at 1506.

DMRS transmission and PUSCH transmission in the same transmission unit may be based on the same RV and the same scrambling sequence.

FIG. 16 is a conceptual data flow diagram 1600 illustrating the data flow between different units / components in the example device 1602. The device may be a UE (eg, UE 115, 115-a, 115-b, 1350). The device includes a receiving component 1604 that receives a downlink communication 1601 from a base station 1650 (eg, base stations 105, 105-a, 105-b, devices 1302/1302 '), and sends an uplink communication 1603 to the base station 1650 Transmission component 1606. Wireless communication may include eMTC. The device may include a segmentation component 1610 configured to segment the uplink duration of each frame into multiple transmission units for each frequency, where the frame includes an integer number of transmission units. The base station can configure or specify the opening and closing periods for each frame type. Accordingly, the apparatus may include a configuration component 1608 configured to receive a configuration of the on / off period from the base station 1650. The transmission component 1606 may be configured to send uplink communications based on a plurality of transmission units, where each transmission unit includes at least one on period and at least one off period corresponding to each of the plurality of frequencies, where the on During the period, the UE sends uplink communications on the corresponding frequency, and during the off period, the UE suppresses sending uplink communications on the corresponding frequency. The apparatus may include an uplink scheduling component 1612 configured to receive the uplink schedule from the base station in the scheduling unit based on the transmission unit. The transmission component 1606 may send an uplink communication based on the received uplink schedule. The apparatus may include a transmission delay component 1614 configured to receive an uplink start delay in a scheduling unit based on a transmission unit. The transmission component 1606 may delay the uplink communication based on the received uplink start delay.

The device may include additional components that execute each of the blocks of the algorithm in the flowchart of FIG. 15 described above. As such, each block of the flowchart of FIG. 15 described above may be performed by components, and the device may include one or more of those components. A component may be specifically configured to execute the program / algorithm, implemented by a processor configured to execute the program / algorithm, stored in a computer-readable medium for implementation by the processor , Or one or more hardware components of some combination thereof.

FIG. 17 is a diagram 1700 illustrating an example of a hardware implementation of a device 1602 'employing a processing system 1714. The processing system 1714 may be implemented using a bus architecture (typically represented by a bus 1724). The bus 1724 may include any number of interconnected buses and bridges, depending on the particular application and overall design constraints of the processing system 1714. The bus 1724 will include various circuits of one or more processors and / or hardware components (represented by the processor 1704), components 1604, 1606, 1608, 1610, 1612, 1614 and computer-readable media / memory 1706 Linked together. The bus 1724 can also connect various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well-known circuits in the field to which the present invention belongs, and will not be described further.

The processing system 1714 may be coupled to a transceiver 1710. The transceiver 1710 is coupled to one or more antennas 1720. The transceiver 1710 provides a unit for communicating with other devices via a transmission medium. The transceiver 1710 receives signals from one or more antennas 1720, extracts information from the received signals, and provides the extracted information to the processing system 1714 (specifically, the receiving component 1604). In addition, the transceiver 1710 receives information from the processing system 1714 (specifically, the transmission component 1606), and generates a signal to be applied to one or more antennas 1720 based on the received information. The processing system 1714 includes a processor 1704 coupled to a computer-readable medium / memory 1706. The processor 1704 is responsible for general processing, including execution of software stored on a computer-readable medium / memory 1706. When the processor 1704 executes software, the software causes the processing system 1714 to perform various functions described above for any particular device. Computer-readable media / memory 1706 can also be used to store data that is manipulated by processor 1704 when executing software. The processing system 1714 also includes at least one of the components 1604, 1606, 1608, 1610, 1612, 1614. The component may be a software component executing in the processor 1704, resident / stored on a computer-readable medium / memory 1706, one or more hardware components coupled to the processor 1704, or some combination thereof . Processing system 1714 may be a component of UE 115 and may include at least one of TX processor 664, RX processor 658, and controller / processor 680 and / or memory 682.

In one configuration, the device for wireless communication 1602/1602 'includes a unit for dividing an uplink duration of each frame into a plurality of transmission units for each frequency, wherein the frame includes an integer The number of transmission units; a unit for transmitting uplink communication based on a plurality of transmission units, wherein each transmission unit includes at least one on period and at least one off period corresponding to each of a plurality of frequencies, wherein During the on period, the UE sends uplink communications on the corresponding frequency, and during the off period, the UE suppresses sending uplink communications on the corresponding frequency; a unit for receiving the on / off period configuration from the base station; A unit for receiving an uplink schedule from a base station in a scheduling unit based on a transmission unit; and a unit for receiving an uplink start delay in a scheduling unit based on a transmission unit.

Processing system 1714 may be a component of UE 115 and may include at least one of TX processor 664, RX processor 658, and controller / processor 680 and / or memory 682.

The above-mentioned units may be one or more of the above-mentioned components of the device 1602 and / or the processing system 1714 of the device 1602 'configured to perform the functions described by the above-mentioned units. As described above, the processing system 1714 may include a TX processor 664, an RX processor 658, and a controller / processor 680. As such, in one configuration, the aforementioned units may be a TX processor 664, an RX processor 658, and a controller / processor 680 configured to perform the functions recited by the aforementioned units.

FIG. 18 is a flowchart 1800 of a wireless communication method. Wireless communication may include IoT communication, such as eMTC, NB-IoT, and so on. This method may be performed by a UE (eg, UE 115, 115-a, 115) configured for wireless communication with a base station (eg, base stations 105, 105-a, 105-b, 1950, device 2202/2202 ') -b, 2250, devices 1902, 1902 '). At 1802, the UE sends an uplink transmission in a plurality of transmission units. The user equipment may send an uplink transmission without performing the LBT procedure at the beginning of the frame.

At 1804, the UE skips the frequency band in the first mode across the frame based on the base station hopping mode, for example, as described in conjunction with FIG. 11. The first mode may include a fixed mode.

The uplink transmission may be sent based on a double-hop mode, for example, as described in connection with FIG. 11. Therefore, at 1806, the UE can also jump in the second mode across the transmission unit within the channel occupation of the base station in the frame. The channel occupancy of the base station may include a narrow frequency band in a specified frequency band. The user equipment can send uplink transmissions in the same narrowband within the corresponding channel occupation of the base station in each frame. The uplink narrowband and downlink narrowband used for wireless communication may be different.

Therefore, when an uplink transmission is sent at 1802, the user equipment can hop based on 1804 and 1806.

User equipment can send up to the maximum number of transmission units per frequency before hopping the frequency band. The maximum number may be based on the number of downlink sub-frames in the frame structure and the number of narrow bands on which the user equipment can hop.

FIG. 19 is a conceptual data flow diagram 1900 illustrating the data flow between different units / components in the example device 1902. The device may be a UE (eg, UE 115, 115-a, 115-b, 2250). The device includes a receiving component 1904 that receives a downlink communication 1901 from a base station 1950 (eg, base stations 105, 105-a, 105-b, devices 2202/2202 '), and sends an uplink communication 1903 to the base station 1950. Transmission component 1906. Wireless communication may include IoT communication, such as eMTC, NB-IoT, and so on. The apparatus may include: a transmission unit component 1908 configured to send an uplink transmission in a plurality of transmission units; and a first hop mode component 1910 configured to base the base station hopping mode and Mode to hop the frequency band. The device may also include a second hop mode component 1912, which is configured to hop in the second mode across the transmission unit within the channel occupation of the base station in the frame, where the uplink transmission is sent based on the double hop mode .

The device may include additional components that execute each of the blocks of the algorithm in the flowchart of FIG. 18 described above. As such, each block of the flowchart of FIG. 18 described above may be performed by components, and the device may include one or more of those components. A component may be specifically configured to execute the program / algorithm, implemented by a processor configured to execute the program / algorithm, stored in a computer-readable medium for implementation by the processor , Or one or more hardware components of some combination thereof.

FIG. 20 is a diagram 2000 illustrating an example of a hardware implementation of the device 1902 'employing the processing system 2014. The processing system 2014 may be implemented using a bus architecture (typically represented by bus 2024). The bus 2024 may include any number of interconnected buses and bridges, depending on the particular application and overall design constraints of the processing system 2014. The bus 2024 connects various circuits including one or more processors and / or hardware components (represented by the processor 2004), components 1904, 1906, 1908, 1910, 1912, and computer-readable media / memory 2006 to together. The bus 2024 can also connect various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well-known circuits in the field to which the present invention belongs, and will not be described further.

The processing system 2014 may be coupled to the transceiver 2010. The transceiver 2010 is coupled to one or more antennas 2020. The transceiver 2010 provides a unit for communicating with other devices via a transmission medium. The transceiver 2010 receives signals from one or more antennas 2020, extracts information from the received signals, and provides the extracted information to the processing system 2014 (specifically, the receiving component 1904). In addition, the transceiver 2010 receives information from the processing system 2014 (specifically, the transmission component 1906), and generates a signal to be applied to one or more antennas 2020 based on the received information. The processing system 2014 includes a processor 2004 coupled to a computer-readable medium / memory 2006. The processor 2004 is responsible for conventional processing, including execution of software stored on a computer-readable medium / memory 2006. When the processor 2004 executes software, the software causes the processing system 2014 to perform the various functions described above for any particular device. The computer-readable medium / memory 2006 may also be used to store data that is manipulated by the processor 2004 when executing software. The processing system 2014 also includes at least one of the components 1904, 1906, 1908, 1910, 1912. The component may be a software component executing in the processor 2004, resident / stored on a computer-readable medium / memory 2006, one or more hardware components coupled to the processor 2004, or some combination thereof . Processing system 2014 may be a component of UE 115 and may include at least one of TX processor 664, RX processor 658, and controller / processor 680 and / or memory 682.

In one configuration, the device for wireless communication 1902/1902 'includes: a unit for transmitting an uplink transmission in a plurality of transmission units; and a base station hopping mode for jumping across a frame in a first mode A unit of a frequency band; and a unit for hopping in a second mode across a transmission unit within a channel occupation of a base station in a frame.

The above-mentioned units may be one or more of the above-mentioned components of the device 1902 and / or the processing system 2014 of the device 1902 'configured to perform the functions described by the above-mentioned units. As described above, the processing system 2014 may include a TX processor 664, an RX processor 658, and a controller / processor 680. As such, in one configuration, the aforementioned units may be a TX processor 664, an RX processor 658, and a controller / processor 680 configured to perform the functions recited by the aforementioned units.

FIG. 21 is a flowchart 2100 of a method of wireless communication. Wireless communication may include IoT communication, such as eMTC, NB-IoT, and so on. The method may be performed by a base station (eg, base stations 105, 105-a, 105) configured to wirelessly communicate with a UE (eg, UE 115, 115-a, 115-b, 2250, device 1902, 1902 ') -b, 1950, device 2202/2202 '). At 2102, the base station skips the frequency band in the first mode across the frame based on the base station skip mode, for example, as described in conjunction with FIG. At 2104, the base station receives the uplink transmission in the narrow band from the UE in a plurality of transmission units in the frequency band based on the base station hopping mode. The uplink transmission may be received from the user equipment based on the double-hop mode, in which the UE hops across the transmission unit in the second mode within the channel occupation of the base station in the frame. The uplink transmission may be received from the user equipment in the same narrowband within the corresponding channel occupation of the base station in each frame.

The base station may include a broadband base station. Therefore, at 2106, the base station can multiplex to communicate with a plurality of narrow-band UEs.

At 2108, the uplink transmission may be received in the uplink narrowband, and the base station may send downlink communications to the user equipment in the downlink narrowband, where the uplink narrowband is different from the downlink Narrow link frequency.

The base station may coordinate with at least one neighboring base station to skip the frequency channel in the first mode across the frame to occupy a different frequency channel than the at least one neighboring base station. The hopping may be performed across multiple frequency channels, the number of which is based on the bandwidth used by the base station. This number may also be based on the minimum number of frequencies required by the user equipment.

FIG. 22 is a conceptual data flow diagram 2200 illustrating the data flow between different units / components in the example device 2202. The device may be a base station (for example, base stations 105, 105-a, 105-b, 1950). The device includes a receiving component 2204 that receives UL communications from a UE (eg, UE 115, 115-a, 115-b, 2250, devices 1902, 1902 '), and a transmitting component 2206 that sends downlink communications to the UE 2250. Wireless communication may include IoT communication, such as eMTC, NB-IoT, and so on. The apparatus may include a hopping component 2208 configured to hop a frequency band in a first mode across a frame based on a base station hopping mode. The receiving component 2204 may be configured to receive an uplink transmission in a narrow frequency from a UE in a plurality of transmission units in a frequency band based on a base station hopping mode. The uplink transmission may be received from the user equipment based on the double-hop mode, in which the UE hops across the transmission unit in the second mode within the channel occupation of the base station in the frame. The uplink transmission may be received from the user equipment in the same narrowband within the corresponding channel occupation of the base station in each frame.

The device may include a wideband base station and may include a multiplexing component 2210 configured to multiplex to communicate with a plurality of narrowband UEs.

Uplink transmissions may be received in an uplink narrowband. The transmission component 2206 may be configured to send downlink communications to the user equipment in a downlink narrowband, where the uplink narrowband is different from the downlink narrowband.

The device may include additional components that execute each of the blocks of the algorithm in the flowchart of FIG. 21 described above. As such, each block of the flowchart of FIG. 21 described above may be performed by components, and the device may include one or more of those components. A component may be specifically configured to execute the program / algorithm, implemented by a processor configured to execute the program / algorithm, stored in a computer-readable medium for implementation by the processor , Or one or more hardware components of some combination thereof.

FIG. 23 is a diagram 2300 illustrating an example of a hardware implementation of a device 2202 'employing the processing system 2314. The processing system 2314 may be implemented using a bus architecture (typically represented by a bus 2324). The bus 2324 may include any number of interconnected buses and bridges, depending on the particular application and overall design constraints of the processing system 2314. The bus 2324 links various circuits including one or more processors and / or hardware components (represented by the processor 2304), components 2204, 2206, 2208, 2210, and computer-readable media / memory 2306. The bus 2324 can also connect various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well-known circuits in the field to which the present invention belongs, and will not be described further.

The processing system 2314 may be coupled to the transceiver 2310. The transceiver 2310 is coupled to one or more antennas 2320. The transceiver 2310 provides a unit for communicating with other devices via a transmission medium. The transceiver 2310 receives signals from one or more antennas 2320, extracts information from the received signals, and provides the extracted information to the processing system 2314 (specifically, the receiving component 2204). In addition, the transceiver 2310 receives information from the processing system 2314 (specifically, the transmission component 2206), and generates a signal to be applied to one or more antennas 2320 based on the received information. The processing system 2314 includes a processor 2304 coupled to a computer-readable medium / memory 2306. The processor 2304 is responsible for general processing, including execution of software stored on a computer-readable medium / memory 2306. When the processor 2304 executes software, the software causes the processing system 2314 to perform various functions described above for any particular device. The computer-readable media / memory 2306 may also be used to store data manipulated by the processor 2304 when executing software. The processing system 2314 also includes at least one of the components 2204, 2206, 2208, 2210. The component may be a software component executing in the processor 2304, resident / stored on a computer-readable medium / memory 2306, one or more hardware components coupled to the processor 2304, or some combination thereof . Processing system 2314 may be a component of base station 105 and may include at least one of TX processor 620, RX processor 638, and controller / processor 640 and / or memory 642.

In one configuration, the device for wireless communication 2202/2202 'includes: a unit for hopping a frequency band in a first mode across a frame based on a base station skip mode; A unit of a plurality of transmission units that receives uplink transmission in a narrow band from a user equipment (UE); a unit for multiplexing communication with a plurality of narrow-band UEs; and a unit for transmitting in a downlink narrow-band A unit for sending downlink communications by the user equipment, wherein the uplink narrowband is different from the downlink narrowband. The above-mentioned units may be one or more of the above-mentioned components of the device 2202 and / or the processing system 2314 of the device 2202 'configured to perform the functions described by the above-mentioned units. As described above, the processing system 2314 may include a TX processor 620, an RX processor 638, and a controller / processor 640. As such, in one configuration, the aforementioned units may be a TX processor 620, an RX processor 638, and a controller / processor 640 configured to perform the functions recited by the aforementioned units.

FIG. 24 is a flowchart 2400 of a method of wireless communication. Wireless communication may include IoT communication, such as eMTC, NB-IoT, and so on. The method may be performed by a base station (eg, base stations 105, 105-a, 105-) configured to wirelessly communicate with a UE (eg, UE 115, 115-a, 115-b, 2550, device 2802, 2802 '). b, 2850, device 2502/2502 '). At 2402, the base station executes an LBT procedure at the beginning of each of the plurality of frames. At 2406, the base station sends a plurality of repetitions of the transmission. The base station transmission may include a control channel transmission, for example, an MPDCCH transmission. The transmission may include data transmission, for example, MPDSCH transmission. When multiple repetitions span multiple sub-frames and the LBT procedure is unsuccessful for the first frame, the base station discards at least one repetition in the first frame or delays at least one repetition in the first frame until the LBT procedure is successful Until the second frame of 2404.

At 2408, the base station may decide to discard at least one repetition or postpone at least one repetition in the frame in which the LBT procedure was unsuccessful. The base station may discard at least one repetition in the first frame. The base station may postpone at least one repetition of the first frame until the second frame when the LBT procedure is successful. The decision at 2408 can be based on at least one of the following: interference environment, possibility of user equipment loss leading to transmission to user equipment, possibility of user equipment making false detections, user equipment Reliability of whether the base station discards or delays transmission is detected, and the user equipment procedure of the UE.

At 2410, the base station may receive at least one of the following: uplink control transmission, uplink data transmission, or when the base station does not send a downlink transmission, the RACH transmission. The base station can receive RACH transmissions from the user equipment, and wherein the RACH transmissions are based on the assigned cell-specific configuration.

FIG. 25 is a conceptual data flow diagram 2500 illustrating the data flow between different units / components in the example device 2502. The device may be a base station (eg, base station 105, 105-a, 105-) configured to wirelessly communicate with a UE (eg, UE 115, 115-a, 115-b, 2550, device 2802, 2802 '). b, 2850). Wireless communication may include IoT communication, such as eMTC, NB-IoT, and so on. The device includes a receiving component 2504 that receives an uplink communication from the UE 2550, and a transmission component 2506 that sends a downlink communication to the UE 2250. The device may include an LBT component 2508 configured to execute an LBT procedure at the beginning of each of the plurality of frames. The device may include a repeating component 2510 configured to send multiple repetitions of a transmission, wherein when the multiple repetitions span multiple sub-frames. When the LBT procedure is unsuccessful for the first frame, the repetition component 2510 may discard at least one repetition in the first frame or postpone at least one repetition in the first frame until the second frame when the LBT procedure is successful. The apparatus may include a discard / delay component 2512 configured to decide to discard at least one repetition or defer at least one repetition of a frame in which the LBT procedure was unsuccessful. The device may include a UL component 2514 configured to receive at least one of the following: uplink control transmission, uplink data transmission, or when the base station does not send a downlink transmission, the RACH transmission from user equipment.

The device may include additional components that execute each of the blocks of the algorithm in the flowchart of FIG. 24 described above. As such, each block of the flowchart of FIG. 24 described above may be performed by components, and the device may include one or more of those components. A component may be specifically configured to execute the program / algorithm, implemented by a processor configured to execute the program / algorithm, stored in a computer-readable medium for implementation by the processor , Or one or more hardware components of some combination thereof.

FIG. 26 is a diagram 2600 illustrating an example of a hardware implementation of a device 2502 'employing a processing system 2614. The processing system 2614 may be implemented using a bus architecture (typically represented by a bus 2624). The bus 2624 may include any number of interconnected buses and bridges, depending on the particular application and overall design constraints of the processing system 2614. The bus 2624 connects various circuits including one or more processors and / or hardware components (represented by the processor 2604), components 2504, 2506, 2508, 2510, 2512, and computer-readable media / memory 2606 to together. The bus 2624 can also connect various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well-known circuits in the field to which the present invention belongs, and will not be described further.

The processing system 2614 may be coupled to the transceiver 2610. The transceiver 2610 is coupled to one or more antennas 2620. The transceiver 2610 provides a unit for communicating with other devices via a transmission medium. The transceiver 2610 receives signals from one or more antennas 2620, extracts information from the received signals, and provides the extracted information to the processing system 2614 (specifically, the receiving component 2504). In addition, the transceiver 2610 receives information from the processing system 2614 (specifically, the transmission component 2506), and generates a signal to be applied to one or more antennas 2620 based on the received information. The processing system 2614 includes a processor 2604 coupled to a computer-readable medium / memory 2606. The processor 2604 is responsible for conventional processing, including execution of software stored on a computer-readable medium / memory 2606. When the processor 2604 executes software, the software causes the processing system 2614 to perform various functions described above for any particular device. Computer-readable media / memory 2606 may also be used to store data that is manipulated by processor 2604 when executing software. The processing system 2614 also includes at least one of the components 2504, 2506, 2508, 2510, 2512. The component may be a software component executing in the processor 2604, resident / stored on a computer-readable medium / memory 2606, one or more hardware components coupled to the processor 2604, or some combination thereof . Processing system 2614 may be a component of base station 105 and may include at least one of TX processor 620, RX processor 638, and controller / processor 640 and / or memory 642.

In one configuration, the device for wireless communication 2502/2502 'includes: a unit for executing an LBT procedure at the beginning of each of the plurality of frames; a plurality of repeated units for transmitting transmissions, When multiple repetitions span multiple sub-frames and the LBT procedure is unsuccessful for the first frame, the base station discards at least one repetition in the first frame or delays at least one repetition in the first frame until the LBT procedure is successful. Up to the second frame at the time; for deciding to discard at least one duplicate or at least one duplicate unit for which the LBT procedure was unsuccessful; and for receiving at least one of the following: uplink Link control transmission, uplink data transmission, or RACH transmission from the user equipment in the frame when the base station does not send a downlink transmission.

The above-mentioned units may be one or more of the above-mentioned components of the device 2502 and / or the processing system 2614 of the device 2502 'configured to perform the functions described by the above-mentioned units. As described above, the processing system 2614 may include a TX processor 620, an RX processor 638, and a controller / processor 640. As such, in one configuration, the aforementioned units may be a TX processor 620, an RX processor 638, and a controller / processor 640 configured to perform the functions recited by the aforementioned units.

FIG. 27 is a flowchart 2700 of a method of wireless communication. Wireless communication may include IoT communication, such as eMTC, NB-IoT, and so on. The method may be performed by a UE (eg, UE 115, 115-a, 115-) configured to wirelessly communicate with a base station (eg, base stations 105, 105-a, 105-b, 2850, device 2502/2502 '). b, 2250, devices 2802, 2802 '). At 2702, the UE receives a plurality of repetitions of a downlink transmission from a base station. The transmission may include a control channel transmission, such as an MPDCCH. Transmission may include data transmission, for example, MPDSCH.

When the plurality of repetitions span multiple frames, at 2704, the UE determines whether the base station sends at least one repetition of the downlink transmission in the first frame. The decision may include deciding whether the base station discards at least one repetition in the first frame or delays at least one repetition in the first frame until the second frame.

At 2706, the UE may combine multiple repetitions across multiple frames.

At 2708, the UE sends at least one of the following: uplink control transmission, uplink data transmission, or RACH transmission from the user equipment in the frame when the base station does not send a downlink transmission . When the base station does not send a downlink transmission, at 2708, the user equipment may send a RACH transmission to the base station in a frame, and the RACH transmission may be based on the assigned cell-specific configuration.

FIG. 28 is a conceptual data flow diagram 2800 illustrating the data flow between different units / components in the example device 2802. The device may be a UE (eg, UE 115, 115-a, 115-) configured to wirelessly communicate with a base station (eg, base stations 105, 105-a, 105-b, 2850, devices 2502/2502 '). b, 2550). Wireless communication may include IoT communication, such as eMTC, NB-IoT, and so on. The device includes a receiving component 2804 that receives a downlink communication from a base station 2850, and a transmission component that sends an uplink communication to the base station 2850.

The receiving component 2804 may be configured to receive a plurality of repetitions of a downlink transmission from a base station. The apparatus may include a decision component 2808 configured to determine whether the base station sends at least one repetition of a downlink transmission in a first frame. The decision may include deciding whether the base station discards at least one repetition in the first frame or delays at least one repetition in the first frame until the second frame. The device may include a combining component 2810 configured to combine a plurality of repetitions across multiple frames. The device may include a UL component 2814 and / or a RACH component 1812 configured to send at least one of the following: uplink control transmission, uplink data transmission, or when the base station does not send a downlink transmission , The RACH transmission from the user equipment in the frame.

The device may include additional components that execute each of the blocks of the algorithm in the flowchart of FIG. 27 described above. As such, each block of the flowchart of FIG. 27 described above may be performed by components, and the device may include one or more of those components. A component may be specifically configured to execute the program / algorithm, implemented by a processor configured to execute the program / algorithm, stored in a computer-readable medium for implementation by the processor , Or one or more hardware components of some combination thereof.

FIG. 29 is a diagram 2900 illustrating an example of a hardware implementation of a device 2802 'employing a processing system 2914. The processing system 2914 may be implemented using a bus architecture (typically represented by a bus 2924). The bus 2924 may include any number of interconnected buses and bridges, depending on the particular application and overall design constraints of the processing system 2914. The bus 2924 will include various circuits of one or more processors and / or hardware components (represented by the processor 2904), components 2804, 2806, 2808, 2810, 2812, 2814, and computer-readable media / memory 2906 Linked together. The bus 2924 can also connect various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well-known circuits in the field to which the present invention belongs, and will not be described further.

The processing system 2914 may be coupled to a transceiver 2910. The transceiver 2910 is coupled to one or more antennas 2920. The transceiver 2910 provides a unit for communicating with other devices via a transmission medium. The transceiver 2910 receives signals from one or more antennas 2920, extracts information from the received signals, and provides the extracted information to the processing system 2914 (specifically, the receiving component 2804). In addition, the transceiver 2910 receives information from the processing system 2914 (specifically, the transmission component 2806), and generates a signal to be applied to one or more antennas 2920 based on the received information. The processing system 2914 includes a processor 2904 coupled to a computer-readable medium / memory 2906. The processor 2904 is responsible for general processing, including execution of software stored on a computer-readable medium / memory 2906. When the processor 2904 executes software, the software causes the processing system 2914 to perform various functions described above for any particular device. The computer-readable media / memory 2906 may also be used to store data manipulated by the processor 2904 when executing software. The processing system 2914 also includes at least one of the components 2804, 2806, 2808, 2810, 2812, 2814. The component may be a software component executing in the processor 2904, resident / stored on a computer-readable medium / memory 2906, one or more hardware components coupled to the processor 2904, or some combination thereof . Processing system 2914 may be a component of UE 115 and may include at least one of TX processor 664, RX processor 658, and controller / processor 680 and / or memory 682.

In one configuration, the device 2802/2802 'for wireless communication includes: a plurality of repeated units for receiving downlink transmissions from a base station; and for determining whether the base station sends the downlink in the first frame At least one repeating unit for transmission; a unit for combining a plurality of repeating units across multiple frames; and a unit for sending at least one of the following: uplink control transmission, uplink data transmission, Or when the base station does not send a downlink transmission, the RACH transmission from the user equipment in the frame.

The above-mentioned units may be one or more of the above-mentioned components of the device 2802 and / or the processing system 2914 of the device 2802 'configured to perform the functions described by the above-mentioned units. As described above, the processing system 2914 may include a TX processor 664, an RX processor 658, and a controller / processor 680. As such, in one configuration, the aforementioned units may be a TX processor 664, an RX processor 658, and a controller / processor 680 configured to perform the functions recited by the aforementioned units.

It should be understood that the specific order or hierarchy of blocks in the disclosed procedures / flow charts is merely an illustration of example methods. It should be understood that the specific order or hierarchy of blocks in the procedure / flow chart may be rearranged based on design preferences. In addition, some blocks can be combined or omitted. The attached method request items provide the elements of each block in sampling order, but are not meant to be limited to the particular order or hierarchy provided.

The previous description is provided to enable any person skilled in the art to which this invention pertains to practice the various aspects described herein. Various modifications to these aspects will be apparent to those having ordinary knowledge in the field to which the present invention pertains, and the general principles defined herein may be applied to other aspects. Therefore, the scope of the patent in this case is not intended to be limited to the form shown herein, but conforms to all categories consistent with what is expressed in the scope of the patent application. Unless explicitly stated otherwise, references to elements in the singular are not Intention means "one and only one", but "one or more". As used herein, the word "exemplary" means "as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects. Unless explicitly stated otherwise, the term "some" refers to one or more. Such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C" The combination of "multiple" and "A, B, C, or any combination thereof" includes any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "A, B and C" The combination of "one or more" and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, Any of these combinations may include one or more members or several members of A, B, or C. All structural and functional equivalents of elements of various aspects described in the content of this case, which are known to those with ordinary knowledge in the art to which this invention belongs or will be known later, are expressly incorporated herein by reference, It is intended to be included by the scope of patent application. In addition, nothing disclosed in this article is intended to be dedicated to the public, regardless of whether such disclosure is explicitly recorded in the scope of the patent application. The words "module", "mechanism", "element", "equipment", etc. may not be substitutes for the word "unit". Thus, no claim element is to be interpreted as a functional module unless the element is explicitly documented using the phrase "unit for ...".

100‧‧‧Wireless communication system

105‧‧‧Base Station

105-a‧‧‧Base Station

105-b‧‧‧Base Station

110‧‧‧Geographic coverage

115‧‧‧UE

115-a‧‧‧UE

115-b‧‧‧UE

125‧‧‧ communication link

130‧‧‧ Core Network

132‧‧‧Reload Link

134‧‧‧Reload Link

200‧‧‧ Figure

200-a‧‧‧Picture

205‧‧‧Base Station

210‧‧‧Two-way link

215‧‧‧Two-way link

220‧‧‧Two-way link

225‧‧‧Two-way link

230‧‧‧Two-way link

240‧‧‧Two-way link

300‧‧‧ Examples

310‧‧‧Wireless communication

320‧‧‧ downlink subframe

325‧‧‧ uplink subframe

330‧‧‧S Sub Frame

335‧‧‧S ’sub frame

340‧‧‧UL (U) cycle

345‧‧‧DL CCA Procedure

350‧‧‧D-CUBS

355‧‧‧DL (D) cycle

360‧‧‧Protection Period (GP)

365‧‧‧UL CCA Procedure

370‧‧‧U-CUBS

400‧‧‧ Examples

405‧‧‧ Expected duration

410‧‧‧actual duration

415‧‧‧CCA Procedure

420‧‧‧CUBS

500‧‧‧ Examples

505‧‧‧ Expected duration

510‧‧‧actual duration

515‧‧‧eCCA Procedure

520‧‧‧CUBS

612‧‧‧Source

620‧‧‧Send Processor

630‧‧‧Transmit (TX) Multiple Input Multiple Output (MIMO) Processor

632 ₁ ‧‧‧Modulator (MOD)

632 _t ‧‧‧Modulator (MOD)

634 ₁ ‧‧‧antenna

634 _t ‧‧‧antenna

636‧‧‧MIMO Detector

638‧‧‧Receiving processor

640‧‧‧Controller / Processor

642‧‧‧Memory

644‧‧‧ Scheduler

646‧‧‧Data slot

652 ₁ ‧‧‧ antenna

652 _r ‧‧‧ antenna

654 ₁ ‧‧‧ Demodulator (DEMOD)

654 _r ‧‧‧ Demodulator (DEMOD)

656‧‧‧MIMO Detector

658‧‧‧Receiving processor

660‧‧‧Data slot

662‧‧‧Source

664‧‧‧Send Processor

666‧‧‧TX MIMO processor

680‧‧‧controller / processor

682‧‧‧Memory

700‧‧‧Frame structure

702‧‧‧LBT

Downlink (DL) part of the 704‧‧‧ frame

Uplink (UL) part of the 706‧‧‧ frame

800‧‧‧Frame structure

802‧‧‧ Initial CCA

804‧‧‧Extended CCA

900‧‧‧ frame structure

902a‧‧‧LBT part

902b‧‧‧LBT part

904a‧‧‧DL Duration

904b‧‧‧DL Duration

906a‧‧‧DL Duration

906b‧‧‧DL Duration

908a‧‧‧Idle hours

908b‧‧‧Idle hours

1000‧‧‧UL transmission unit

1002‧‧‧ Opening Hours

1004‧‧‧Closed

1006‧‧‧Closed

1008‧‧‧Opening hours

1100‧‧‧Frame structure

1102‧‧‧LBT part

Part 1104‧‧‧DL

1106‧‧‧Transmission Unit

1108‧‧‧Transmission Unit

1110‧‧‧Transmission Unit

1200‧‧‧flow chart

1202‧‧‧block

1204‧‧‧box

1206‧‧‧box

1208‧‧‧box

1210‧‧‧box

1212‧‧‧box

1214‧‧‧box

1216‧‧‧box

1218‧‧‧box

1220‧‧‧box

1222‧‧‧box

1300‧‧‧Conceptual data flow diagram

1302‧‧‧ device

1302'‧‧‧ device

1304‧‧‧Receiving component

1306‧‧‧Transmission component

1308‧‧‧Double CCA components

1310‧‧‧CCA components

1312‧‧‧eCCA components

1314‧‧‧CCA decision component

1316‧‧‧Reserved components

1318‧‧‧Frame transmission component

1350‧‧‧UE

1400‧‧‧Picture

1404‧‧‧Processor

1406‧‧‧Computer-readable media / memory

1410‧‧‧ Transceiver

1414‧‧‧Processing System

1420‧‧‧ Antenna

1424‧‧‧Bus

1500‧‧‧flow chart

1502‧‧‧box

1504‧‧‧box

1506‧‧‧box

1508‧‧‧box

1510‧‧‧box

1600‧‧‧Conceptual data flow diagram

1601‧‧‧ downlink communication

1602‧‧‧ device

1602'‧‧‧ device

1603‧‧‧ uplink communication

1604‧‧‧Receiving component

1606‧‧‧Transmission component

1608‧‧‧Configuration components

1610‧‧‧ split component

1612‧‧‧ uplink scheduling component

1614‧‧‧Transfer Delay Component

1650‧‧‧Base Station

1700‧‧‧Picture

1704‧‧‧Processor

1706‧‧‧Computer-readable media / memory

1710‧‧‧ Transceiver

1714‧‧‧Processing System

1720‧‧‧ Antenna

1724‧‧‧Bus

1800‧‧‧flow chart

1802‧‧‧box

1804‧‧‧box

1806‧‧‧box

1900‧‧‧Conceptual data flow diagram

1901‧‧‧ downlink communication

1902‧‧‧ device

1902'‧‧‧ device

1903‧‧‧ uplink communication

1904‧‧‧Receiving component

1906‧‧‧Transmission component

1908‧‧‧Transmission unit assembly

1910‧‧‧First Jump Mode Component

1912‧‧‧Second Jump Mode Component

1950‧‧‧Base Station

2000‧‧‧ Figure

2004‧‧‧Processor

2006‧‧‧Computer-readable media / memory

2010‧‧‧Transceiver

2014‧‧‧Processing System

2020‧‧‧antenna

2024‧‧‧Bus

2100‧‧‧Flowchart

2102‧‧‧box

2104‧‧‧box

2106‧‧‧box

2108‧‧‧box

2200‧‧‧Conceptual Data Flow Diagram

2202‧‧‧device

2202'‧‧‧ device

2204‧‧‧Receiving component

2206‧‧‧Transmission component

2208‧‧‧Jump Components

2210‧‧‧Multiplex

2250‧‧‧UE

2300‧‧‧Picture

2304‧‧‧Processor

2306‧‧‧Computer-readable media / memory

2310‧‧‧ Transceiver

2314‧‧‧Processing System

2320‧‧‧ Antenna

2324‧‧‧Bus

2400‧‧‧flow chart

2402‧‧‧box

2404‧‧‧box

2406‧‧‧box

2408‧‧‧box

2410‧‧‧box

2500‧‧‧ conceptual data flow diagram

2502‧‧‧ device

2502'‧‧‧ device

2504‧‧‧Receiving component

2506‧‧‧Transmission component

2508‧‧‧LBT components

2510‧‧‧ Duplicate

2512‧‧‧Discard / Postpone Components

2514‧‧‧UL components

2550‧‧‧UE

2600‧‧‧Picture

2604‧‧‧Processor

2606‧‧‧Computer-readable media / memory

2610‧‧‧ Transceiver

2620‧‧‧ Antenna

2624‧‧‧Bus

2700‧‧‧flow chart

2702‧‧‧box

2704‧‧‧block

2706‧‧‧box

2708‧‧‧box

2800‧‧‧Conceptual Data Flow Diagram

2802‧‧‧device

2802'‧‧‧ device

2804‧‧‧Receiving component

2806‧‧‧Transmission component

2808‧‧‧Decision component

2810‧‧‧Combination components

2812‧‧‧RACH components

2814‧‧‧UL components

2850‧‧‧Base Station

2900‧‧‧Picture

2904‧‧‧Processor

2906‧‧‧Computer-readable media / memory

2910‧‧‧ Transceiver

2914‧‧‧Processing System

2920‧‧‧antenna

2924‧‧‧Bus

FIG. 1 is a diagram illustrating an example of a wireless communication system according to various aspects of the content of this case.

FIG. 2A is a diagram illustrating an example of a deployment scenario for using LTE in an unlicensed spectrum according to various aspects of the content of this case.

2B is a diagram illustrating another example of a deployment scenario for using LTE in an unlicensed spectrum according to various aspects of the content of the present case.

FIG. 3 is a diagram illustrating an example of carrier aggregation when LTE is used in both licensed spectrum and unlicensed spectrum according to various aspects of the content of the present case.

FIG. 4 illustrates an example of a CCA procedure executed by a transmitting device when contention for access to a contention-based shared radio frequency band is based on various aspects of the content of the present case.

FIG. 5 illustrates an example of an eCCA program executed by a transmitting device when contending for access to a contention-based shared radio frequency band according to various aspects of the content of the present case.

FIG. 6 illustrates a block diagram of a design of a base station / evolved node B (eNB) and a UE (they may be one of the base station / eNB in FIG. 1 and one of the UE).

FIG. 7 illustrates an example frame structure according to the aspect introduced in this article.

FIG. 8 illustrates an example CCA / eCCA structure according to aspects described herein.

FIG. 9 illustrates an example frame structure according to the aspect introduced in this article.

FIG. 10 illustrates an example transmission unit structure according to the aspect introduced in this paper.

FIG. 11 illustrates an example frame structure according to the aspect introduced in this article.

FIG. 12 is a flowchart of a wireless communication method at a base station.

13 is a conceptual data flow diagram illustrating the data flow between different units / components in an example device.

FIG. 14 is a diagram illustrating an example of a hardware implementation of a device employing a processing system.

FIG. 15 is a flowchart of a wireless communication method at a user equipment.

FIG. 16 is a conceptual data flow diagram illustrating the data flow between different units / components in an example device.

FIG. 17 is a diagram illustrating an example of a hardware implementation of a device employing a processing system.

FIG. 18 is a flowchart of a wireless communication method at a user equipment.

FIG. 19 is a conceptual data flow diagram illustrating the data flow between different units / components in an example device.

FIG. 20 is a diagram illustrating an example of a hardware implementation of a device employing a processing system.

FIG. 21 is a flowchart of a method of wireless communication at a base station.

22 is a conceptual data flow diagram illustrating the data flow between different units / components in an example device.

FIG. 23 is a diagram illustrating an example of a hardware implementation of a device employing a processing system.

FIG. 24 is a flowchart of a wireless communication method at a base station.

25 is a conceptual data flow diagram illustrating the data flow between different units / components in an example device.

FIG. 26 is a diagram illustrating an example of a hardware implementation of a device employing a processing system.

FIG. 27 is a flowchart of a wireless communication method at a user equipment.

FIG. 28 is a conceptual data flow diagram illustrating the data flow between different units / components in an example device.

FIG. 29 is a diagram illustrating an example of a hardware implementation of a device employing a processing system.

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Claims (40)

A method for wireless communication at a base station includes the following steps: a pair of idle channel assessment (CCA) procedures for a frame are performed, wherein the dual CCA procedures include a first type of CCA procedure, and when the first When the type of CCA procedure is unsuccessful, the first type of CCA procedure is followed by a second type of CCA procedure; when at least one CCA procedure in the dual CCA procedure is successful, sending during the frame; and when the When both CCA procedures in the dual CCA procedure are unsuccessful, transmission is suppressed during the frame period. The method according to claim 1, wherein the CCA program of the first type includes CCA and the CCA program of the second type includes extended CCA (eCCA). The method according to claim 2, wherein executing the dual CCA procedure includes the following steps: executing the CCA in a first time period; and when the CCA is unsuccessful, executing the eCCA in a second time period following the CCA . The method according to claim 3, wherein the second time period is longer than the first time period. The method according to claim 3 also includes the following steps: when the CCA is successful, sending a reserved signal; and sending a frame transmission following the reserved signal. The method according to claim 3 also includes the following steps: when the eCCA is successful, sending a reserved signal; and sending a frame transmission following the reserved signal. The method according to claim 3 also includes the following steps: when the eCCA is unsuccessful, waiting until the next CCA position at the next frame boundary; and executing the eCCA at the next CCA position. The method according to claim 3, wherein a first transmission time corresponding to the CCA procedure of the first type is independent of a first duration of the CCA of the first type, and a first transmission time corresponding to the second CCA procedure The two transmission times are based on a second duration of the second type of CCA. The method according to claim 1, wherein the dual CCA procedure is performed when the base station transmits on a previous frame or before the base station transmits the frame as a first frame on a frequency. The method according to claim 1, wherein the wireless communication includes enhanced machine type communication (eMTC). A device for wireless communication at a base station includes: a unit for executing a pair of idle channel assessment (CCA) programs for a frame, wherein the dual CCA program includes a first type of CCA program, when When the first type of CCA procedure is unsuccessful, the first type of CCA procedure is followed by a second type of CCA procedure; and is used to perform during the frame when at least one CCA procedure in the dual CCA procedure is successful. A transmission unit; and a unit for suppressing transmission during the frame when both CCA procedures in the dual CCA procedure are unsuccessful. The device according to claim 11, wherein the CCA program of the first type includes CCA, and the CCA program of the second type includes extended CCA (eCCA). The device according to claim 12, wherein the unit for executing the dual CCA program executes CCA within a first time period, and when the CCA is unsuccessful, executes within a second time period following the CCA eCCA. The device according to claim 13, wherein the second time period is longer than the first time period. The device according to claim 13, wherein the unit for sending sends a reserved signal when the CCA succeeds, and sends a frame transmission following the reserved signal. The device according to claim 13, wherein the unit for sending sends a reserved signal when the eCCA is successful, and sends a frame transmission following the reserved signal. The device according to claim 13, wherein when the eCCA is unsuccessful, the unit for waiting waits until the next CCA position at the next frame boundary, and wherein the unit for executing a pair of CCA procedures ECCA is performed at this next CCA location. The apparatus according to claim 13, wherein a first transmission time corresponding to the first type of CCA program is independent of a first duration of the first type of CCA, and a first time corresponding to the second CCA program is The two transmission times are based on a second duration of the second type of CCA. The device according to claim 11, wherein the dual CCA procedure is executed when the base station transmits on a previous frame or before the base station transmits the frame as a first frame on a frequency. The device according to claim 11, wherein the wireless communication includes enhanced machine type communication (eMTC). A device for wireless communication at a base station includes: a memory; and at least one processor coupled to the memory and configured to perform the following operations: perform a pair of idle channel evaluations for a frame (CCA) program, where the dual CCA program includes a first type CCA program, and when the first type CCA program is unsuccessful, the first type CCA program is followed by a second type CCA program; when the When at least one CCA procedure in the dual CCA procedure is successful, transmission is performed during the frame; and when both CCA procedures in the dual CCA procedure are unsuccessful, transmission is suppressed during the frame period. The apparatus according to claim 21, wherein the CCA program of the first type includes CCA and the CCA program of the second type includes extended CCA (eCCA). The apparatus according to claim 22, wherein executing the dual CCA procedure includes: executing CCA in a first time period; and when the CCA is unsuccessful, executing eCCA in a second time period following the CCA. The device according to claim 23, wherein the second time period is longer than the first time period. The apparatus according to claim 23, wherein the at least one processor is also configured to perform the following operations: when the CCA is successful, send a reservation signal; and send a frame transmission following the reservation signal. The device according to claim 23, wherein the at least one processor is also configured to perform the following operations: when the eCCA is successful, send a pre-reservation signal; and send a frame transmission following the reserved signal. The device according to claim 23, wherein the at least one processor is also configured to perform the following operations: when the eCCA is unsuccessful, wait until the next CCA position at the next frame boundary; and at the next ECCA is performed at the CCA location. The device according to claim 23, wherein a first transmission time corresponding to the first type of CCA program is independent of a first duration of the first type of CCA, and a first time corresponding to the second CCA program is The two transmission times are based on a second duration of the second type of CCA. The device according to claim 21, wherein the dual CCA procedure is executed when the base station transmits on a previous frame or before the base station transmits the frame as a first frame on a frequency. The device according to claim 21, wherein the wireless communication includes enhanced machine type communication (eMTC). A computer-readable medium storing computer-executable code for wireless communication at a base station, including code for: performing a pair of idle channel assessment (CCA) procedures for a frame, wherein the The dual CCA program includes a first type of CCA program. When the first type of CCA program is unsuccessful, the first type of CCA program is followed by a second type of CCA program. When at least one of the dual CCA programs is When the CCA procedure is successful, transmission is performed during the frame; and when both CCA procedures in the dual CCA procedure are unsuccessful, transmission is suppressed during the frame. The computer-readable medium according to claim 31, wherein the CCA program of the first type includes CCA and the CCA program of the second type includes extended CCA (eCCA). The computer-readable medium according to claim 32, wherein executing the dual CCA program includes: executing CCA within a first time period; and when the CCA is unsuccessful, within a second time period following the CCA Perform eCCA. The computer-readable medium according to claim 33, wherein the second time period is longer than the first time period. The computer-readable medium according to claim 33 also includes code for performing the following operations: when the CCA is successful, sending a reserved signal; and sending a frame transmission following the reserved signal. The computer-readable medium according to claim 33 also includes code for performing the following operations: when the eCCA is successful, sending a reserved signal; and sending a frame transmission following the reserved signal. The computer-readable media according to claim 33 also includes code for the following operations: When the eCCA is unsuccessful, wait until the next CCA position at the next frame boundary; and at the next ECCA is performed at the CCA location. The computer-readable medium according to claim 33, wherein a first transmission time corresponding to the CCA program of the first type is independent of a first duration of the CCA of the first type and is related to the second CCA program. The corresponding second transmission time is based on a second duration of the second type CCA. The computer-readable medium according to claim 31, wherein when the base station sends on a previous frame or before the base station sends the frame as a first frame on a frequency, execute the Double CCA procedure. The computer-readable medium according to claim 31, wherein the wireless communication includes enhanced machine type communication (eMTC).